Smallcaps in text and author index with biblatex 3.4 and biber 2.4

After updating my TeXLive 2015 recently, now including Biber 2.4 and Biblatex 3.4, I'm unable to get smallcaps for authors' names in text, footnotes and in the authors' index. When I revert to Biber 2.3 and Biblatex 3.2 (not sure if this was the version), I do get smallcaps where I want.  Here is my MWE:  %!TEX TS-program = xelatex %!TEX encoding = UTF-8 Unicode  \documentclass[11pt]{memoir} \usepackage{fontspec} \usepackage{imakeidx} \makeindex[name=name,intoc,title=Authors index] \makeindex[name=topics,intoc,title=Topics index] \usepackage{polyglossia} \setdefaultlanguage{english} %%%%%%%%%%%%%%%%%% Bibliography \usepackage[backend=biber,% indexing=cite,% style=authortitle]% {biblatex} \usepackage{filecontents} \begin{filecontents}{jobname.bib} @book{BOOK, author = {Doe, John}, title = {great book}, date = {2015-04-01}, } \end{filecontents} \addbibresource{jobname.bib} \DeclareIndexNameFormat{default}{% \usebibmacro{index:name}{\index[name]}{% \textsc{#1}}{#4}{#5}{#7}} \renewcommand{\mkbibnamelast}{\textsc} \setlength\bibitemsep{0pt}  %%%%%%%%%%%%%%%% Document \begin{document} This is text, with a slight\index[topics]{Complication} complication.\autocite[33]{BOOK}  \printbibliography \clearpage \printindex[name] \clearpage \printindex[topics] \end{document}   Here are the errors I get:  Latex Error: ./test_biblatex3_4.tex:27 Illegal parameter number in definition of \blx@defformat@d.  Latex Error: ./test_biblatex3_4.tex:27 Illegal parameter number in definition of \blx@defformat@d.  Latex Error: ./test_biblatex3_4.tex:27 Illegal parameter number in definition of \blx@defformat@d.  Latex Error: ./test_biblatex3_4.tex:34 Illegal parameter number in definition of \theindexentry.  Latex Error: ./test_biblatex3_4.tex:34 Illegal parameter number in definition of \theindexentry.  Latex Error: ./test_biblatex3_4.tex:34 Illegal parameter number in definition of \theindexentry.  Latex Error: ./test_biblatex3_4.tex:34 Illegal parameter number in definition of \reserved@a.  Latex Error: ./test_biblatex3_4.tex:34 Illegal parameter number in definition of \reserved@a.  Latex Error: ./test_biblatex3_4.tex:34 Illegal parameter number in definition of \reserved@a.   Any help would be greatly appreciated.


Intersection of finitely generated ideals

Let $I$, $J$ be finitely generated ideals in a ring $A$ (commutative with identity). I know that the intersection need not be finitely generated: can somebody give me an example?   Thanks.


I just upgraded to Ubuntu 14.04 and I have been trying to fix an error somewhere in the install process. No matter how I install (software center, Terminal) it displays an error message close to this:  installAr  chives() failed: Selecting previously unselected package libept1.4.12:amd64. (Reading database ...  (Reading database ... 5% (Reading database ... 10% (Reading database ... 15% (Reading database ... 20% (Reading database ... 25% (Reading database ... 30% (Reading database ... 35% (Reading database ... 40% (Reading database ... 45% (Reading database ... 50% (Reading database ... 55% (Reading database ... 60% (Reading database ... 65% (Reading database ... 70% (Reading database ... 75% (Reading database ... 80% (Reading database ... 85% (Reading database ... 90% (Reading database ... 95% (Reading database ... 100% (Reading database ... 242784 files and directories currently installed.) Preparing to unpack .../libept1.4.12_1.0.12_amd64.deb ... Unpacking libept1.4.12:amd64 (1.0.12) ... Selecting previously unselected package sgml-data. Preparing to unpack .../sgml-data_2.0.9-1_all.deb ... Unpacking sgml-data (2.0.9-1) ... Selecting previously unselected package docbook-xml. Preparing to unpack .../docbook-xml_4.5-7.2_all.deb ... Unpacking docbook-xml (4.5-7.2) ... Selecting previously unselected package librarian0. Preparing to unpack .../librarian0_0.8.1-5ubuntu1_amd64.deb ... Unpacking librarian0 (0.8.1-5ubuntu1) ... Selecting previously unselected package rarian-compat. Preparing to unpack .../rarian-compat_0.8.1-5ubuntu1_amd64.deb ... Unpacking rarian-compat (0.8.1-5ubuntu1) ... Selecting previously unselected package synaptic. Preparing to unpack .../synaptic_0.81.1ubuntu1_amd64.deb ... Unpacking synaptic (0.81.1ubuntu1) ... Processing triggers for sgml-base (1.26+nmu4ubuntu1) ... Processing triggers for doc-base (0.10.5) ... Scrollkeeper was installed, forcing re-registration of all documents. Unregistering 33 doc-base files, re-registering 33 doc-base files... Registering documents with scrollkeeper... Processing triggers for bamfdaemon (0.5.1+14.04.20140409-0ubuntu1) ... Rebuilding /usr/share/applications/bamf-2.index... Processing triggers for desktop-file-utils (0.22-1ubuntu1) ... Processing triggers for gnome-menus (3.10.1-0ubuntu2) ... Processing triggers for mime-support (3.54ubuntu1) ... Processing triggers for hicolor-icon-theme (0.13-1) ... Processing triggers for man-db (2.6.7.1-1) ... Setting up xserver-common-lts-raring (3:5) ... Removing 'diversion of /usr/lib/xorg/protocol.txt to /usr/lib/xorg/protocol-precise.txt by xserver-common-lts-raring' dpkg-divert: error: rename involves overwriting `/usr/lib/xorg/protocol.txt' with   different file `/usr/lib/xorg/protocol-precise.txt', not allowed dpkg: error processing package xserver-common-lts-raring (--configure):  subprocess installed post-installation script returned error exit status 2 Setting up libept1.4.12:amd64 (1.0.12) ... Setting up sgml-data (2.0.9-1) ... Setting up librarian0 (0.8.1-5ubuntu1) ... Setting up synaptic (0.81.1ubuntu1) ... Processing triggers for sgml-base (1.26+nmu4ubuntu1) ... Setting up docbook-xml (4.5-7.2) ... Processing triggers for sgml-base (1.26+nmu4ubuntu1) ... Setting up rarian-compat (0.8.1-5ubuntu1) ... Processing triggers for libc-bin (2.19-0ubuntu6) ... Error in function:  Setting up xserver-common-lts-raring (3:5) ... Removing 'diversion of /usr/lib/xorg/protocol.txt to /usr/lib/xorg/protocol-precise.txt by xserver-common-lts-raring' dpkg-divert: error: rename involves overwriting `/usr/lib/xorg/protocol.txt' with   different file `/usr/lib/xorg/protocol-precise.txt', not allowed dpkg: error processing package xserver-common-lts-raring (--configure):  subprocess installed post-installation script returned error exit status 2   In Software Center it displays that "Package Operation Failed"  It does install the programs I want, but I would really like to get rid of the error message.  Thanks!


How can I search for a string containing a colon?

I'm trying to conduct a search for a specific class name (containing colons): e.g. search parameters [perl] Class::Data and am coming up empty:  and  are both redirected to   Is there any way of conducting such a search?  EDIT:  I'm making this a feature request for the ability to search with colons. -Lance


How do I add and display a custom image field to a category?   I know I need to use the hook 'category_add_form_fields' however I am not quite sure how... I am relatively new to wordpress so any help is greatly appreciated!


Call function with argument Object& in c++

I want to hand over to a function a pointer to an object and then work with this in the function. However this somehow does not work. Please excuse if my nomenclature is not correct. I haven't worked with c++ for a while. Here is my code: #include <iostream> #include <array> #include <fstream>  class Grid { public:   std::array<std::array<std::array<double,10>, 10>, 10> chi;   Grid(); };  Grid::Grid() {   std::array<std::array<std::array<double,10>, 10>, 10> chi={};   }  void set_initial_conditions(Grid& g);  int main () {   Grid g();// greate object   set_initial_conditions(g);// set the initial conditions.     return 0; }  void set_initial_conditions(Grid& g) {   std::cout<<"set initial conditions"<<std::endl; }  When compiling with c++ -o minimal_example minimal_example.cpp -std=c++17  I get the following error message: minimal_example.cpp: In function ‘int main()’: minimal_example.cpp:22:26: error: invalid initialization of reference of type ‘Grid&’ from expression of type ‘Grid()’    22 |   set_initial_conditions(g);       |                          ^ minimal_example.cpp:18:35: note: in passing argument 1 of ‘void set_initial_conditions(Grid&)’    18 | void set_initial_conditions(Grid& g);       |                             ~~~~~~^


Ubuntu script language doesn't work as expect

As a beginner of bash script, I wrote a simple script to change the directory. Here it is my source code:  #!/bin/bash  set -x echo "---------------------START-----------" cd /home/cocadas/Workspace/carnd/CarND-Behavioral-Cloning-P3   I save it as "start" in the /root folder. I change the property of the file to be executable, and then run it as below. The problem is that the execution command cd doesn't work. What did I miss?  cocadas@cocadas-ThinkPad-W540:~$ ./start + echo ---------------------START----------- ---------------------START----------- + cd /home/cocadas/Workspace/carnd/CarND-Behavioral-Cloning-P3 cocadas@cocadas-ThinkPad-W540:~$ cd /home/cocadas/Workspace/carnd/CarND-Behavioral-Cloning-P3 cocadas@cocadas-ThinkPad-W540:~/Workspace/carnd/CarND-Behavioral-Cloning-P3$


How to refer Javascript cloud page in my email in content builder?

I have a Javascript file written and saved in Cloud Page. Now,I want to refer this Javascript file from Cloud page inside my email in Content Builder. The reason why I am following this approach is because content builder removes Javascript statements mentioned implicitly inside emails. Any help would be much appreciated


Feeling a tingling sensation by touching stuff, Is this safe?

I'm putting on my desktop computer on steel rack as usual. A while ago, when I touch the steel rack for seconds, practically I feel a tingling sensation, sort of electrical shock in my finders. After that I measured how voltage the steel rack has, the multi-tester meter indicated almost 50V by AC mode. Is this safe to touch or keep the PC on the position, or I should get away the PC somewhere electricity-safe? I'm not sure this site is suit for asking this kind of question, but I'm very worrying whether this is safe or not since this experience is my very first time. Thank you.


Can the update manager download only a single package at a time?

I need the update manager to only download a single package at a time and not try to download multiple packages at once.  My slow internet cannot handle multiple connections; slows the download to a crawl and some packages will reset themselves halfway through when they time-out.  EDIT  When using apt-get update multiple repositories get checked:   When using apt-get upgrade multiple packages are downloaded:


Prove that $\frac{a}{b+c} +\frac{b}{c+a}+\frac{c}{a+b} \ge \frac{3}{2}$ My steps  A= $\frac{a}{b+c}$,B= $\frac{b}{c+a}$ &C=$\frac{c}{a+b}$  A.M$\ge$H.M  $\frac{A+B+C}{3} \ge \frac{3ABC}{AB+BC+AC}$  I am struck after this step  ${A+B+C} \ge \frac{9}{\frac{a}{c}+\frac{c}{a}+\frac{b}{a}+\frac{a}{b}+\frac{c}{b}+\frac{b}{c}}$


A moment ago I tried to fill all space in a USB drive by typing yes > a to create a very large file and overwrite the old (sensitive) data. But then, when the file grew to 4GB I got this error, and the yes process became unkillable: yes: standard output: File too large  I attempted to kill the yes > a command with Ctrl+C and kill -9 but both failed (Ctrl+C didn't do anything, kill -9 returned with code 0 but didn't kill the process): ~ $ ps -fea | grep yes my_user  8193  8084  1 09:58 pts/2    00:00:13 yes my_user  9928  9847  0 10:20 pts/6    00:00:00 grep yes ~ $ kill -9 8193 ~ $ ps -fea | grep yes my_user  8193  8084  1 09:58 pts/2    00:00:13 yes my_user  9939  9847  0 10:20 pts/6    00:00:00 grep yes  You can see the kill command returned, but ps continued showing the process (and the console that was running yes > a continued to be blocked). After some 10 minutes the process finally finished. But why did the kill -9 not work? Some more info:  USB filesystem: vfat Linux version: Ubuntu 18.04.2 LTS


I often hear questions like will you? or shall you? used in an unusual way, and I would like to understand what that usage is for. Take this conversation for example:   How were you able to do it? You shall never know, shall you?   This shall you? isn't a normal questions, he's not really asking the other party to if he shall or *shall not. But what does it mean?  Thank you in advance for your help.


Troubleshooting of updation during installation of ns2 in ubuntu

Due to install the ns2 program in ubuntu, ubuntu updation is not running successfully. Error occurs like -   Err http://security.ubuntu.com quantal-security/main Sources   404  Not Found [IP: **.***.**.*** **] Err http://security.ubuntu.com quantal-security/restricted Sources   404  Not Found [IP: **.***.**.*** **]


When I try to install SQL Server, I get this error:   The following packages have unmet dependencies:  mssql-server : Depends: libcurl3 but it is not going to be installed                 Depends: openssl (<= 1.1.0) E: Unable to correct problems, you have held broken packages.   How can I fix it?


What happened to new questions counts for filters on the Filtered Question page?

When I was entering Filtered Questions page on the StackExchange, in the Select Filter area I could see the number of new questions related to given filter.  It was very useful to see, if there are any new messages for the given filter.  What has happened to that feature? Is it gone for good or only temporarily?


How to type this complicated fraction in latex?

As shown in the below screenshot, how could I type this complicated fraction for x_n in problem 5?


Noob linux here trying to understand wildcard matching when using find. #find /opt/spark/jars -name data* #find /opt/spark/jars -name datan* /opt/spark/jars/datanucleus-rdbms-3.2.9.jar /opt/spark/jars/datanucleus-core-3.2.10.jar /opt/spark/jars/datanucleus-api-jdo-3.2.6.jar  How come data* doesn't match anything but datan* does?


Is there a way to download or save voice recordings from messenger?

Is it possible to download or save a voice recording sent via facebook messenger?  I can't find ANY reference on Google or elsewhere as to how to do this. Seems if you record it from iPhone (Messenger app), it must be stored somewhere - I was hoping it would auto-save to Voice Memos app, but no such luck.


does anyone how does Linux decide which interpreter to call when running a text script?  i need the detail, the purpose of the ‘shebang’ and how


How does one solve the equation of a circle through three given points?...  (81,45) (81,-45) (85,0)  What is the solution to this???  I'm at a loss


Is a state with definite momentum possible in presence of an infinite square-well potential?

The momentum operator is usually defined as  $$\hat p = -i \hbar \frac d {dx}$$  The eigenfunctions of this operator are plane waves  $$\tag{1} \label{1} \psi_p(x) = A \exp\left(\frac{i p x}{\hbar}\right)$$  and they are not square-integrable, i.e.  $$\int_{\mathbb R} | \psi_p(x)|^2 dx = \infty$$  therefore, it is usually said that a free particle with a well-defined momentum is a physical impossibility.  But we have considered a case in which the wavefunction $\psi$ can extend from $-\infty$ to $\infty$. In general, the wavefunction $\psi$ should satisfy the following conditions:  $$\tag{2} \label{2} \psi \in C^0 (\mathbb R)$$ $$\tag{3} \label{3} \int_\mathbb{R} | \psi(x)|^2 dx = 1$$  In the case of an infinite square-well potential  $$V(x) = 0 \ \ \ \text{if} \ x \in [0,L]$$ $$V(x) = \infty \ \ \ \text{if} \ x \notin [0,L]$$  we usually require that   $$\tag{4} \label{4} \psi(x) = 0 \ \ \ \text{if} \ x \notin [0,L]$$  so that \ref{2} implies  $$\tag{5} \label{5} \psi(L)=\psi(0)=0$$  But by applying \ref{5} to \ref{1}, we obtain  $$\tag{6} \label{6} e^{ipL/\hbar}=1=0$$  which is clearly absurd and cannot be valid.  However, in  the authors introduce a self-adjoint extension of the operator $\hat p$ (which they call $P_\theta$) by replacing \ref{5} with  $$\tag{7}\label{7} \psi(L)=e^{i \theta} \psi(0)$$  from which they obtain the "momentum eigenfunctions"  $$\tag{8} \label{8} \phi_n(x,\theta) = \frac 1 {\sqrt{L}} \exp \left(2 i \pi \nu \frac x L \right), \ \ \ \nu = n + \frac{\theta}{2 \pi}, \ \ \ n \in \mathbb Z$$  They conclude with the remark     For a particle in a box, it is often argued that the “physical” wave   function should continuously vanish on the walls $x = 0$ and $x = L$,   ensuring that the presence probability vanishes continuously for $x ≤0$   and for $x ≥ L$. One should realize that the continuity of the   measurable quantity      $$ Pr(0 ≤ x ≤ u) = \int_0^u |\phi(x)|^2 dx, \ \ \ u \in[0,L] $$ is   ensured as soon as the integral $\int_0^L |\phi(x)|^2 dx $ does   converge and does not require any continuity property of $\phi(x)$.   Specializing this remark to the eigenfunctions of $P_\theta$ we   observe that $|\phi_n(x,\theta)|^2$ does not vanish continuously at $x=0$   but nevertheless the physical quantity $$Pr(0 ≤ x ≤ u) = \frac{u}{L}$$ vanishes continuously, as it should, for $u \to 0$.   They also say that the Heisenberg inequlity is not valid for the "momentum eigenfunctions" of Eq. \ref{8}, and indeed we would obtain  $$\sigma_p = 0$$ $$\sigma_x = \frac{L}{\sqrt {12}}$$   From a mathematical point of view, their reasoning is more or less clear to me: if we replace \ref{5} with \ref{7} and restrict ourselves to the interval $[0,L]$, it is possible to extend the momentum operator, making it self-adjoint, and to introduce eigenfunctions for this extended version. But is this reasoning physically meaningful?   In particular, what about the value of the wavefunction outside the interval $[0,L]$? Also, what about the Heisenberg inequality? Is the fact that it is not valid acceptable from a physical point of view?    Update  I don't understand if the authors are implying that the wave function is set to $0$ for $x \notin [0,L]$; if this was the case, shouldn't we have the problem that $Pr(0\leq x \leq u)$ is discontinuous at $u=L$?


Do electrons in a wire, actually jump across two metallic wires twisted together?

Whenever we twist two wires together to make a circuit, there's no soldering or fusing-together of wires involved. So, in such a case do electrons jump across the microscopic air gaps which are present in between the two wires? Or is it just that they influence the electrons of the next wire to move?  If it is the latter case, what exactly constitutes an electric current? flow of electrons literally or just the transfer of energy etc. ?


I am analyzing the following code sample:  >>> def check(v): ...     for t in v: ...             yield t ...             if t==2: ...                     yield "a"   Do I understand correctly that the two last lines of code will never be executed, because yield works as return. So, basically the first yield in a for loop (before the if clause) will always be applied.  Is my understanding correct?  UPDATE:  I do not understand why do I get the sequence 2, a, 2, a, 1, ... and not this one: 1,a,1,...  >>> my_list = [2,2,1,2,3] >>> f = check(my_list) >>> f.next() 2 >>> f.next() 'a' >>> f.next() 2 >>> f.next() 'a' >>> f.next() 1 >>> f.next() 2


Let n and r be positive integers with n ≥ r. Prove that   ($\tfrac{r}{r}$) + ($\tfrac{r + 1}{r}$) + • • • + ($\frac{n}{r}$) = ($\tfrac{n + 1}{r + 1}$)   I was trying to do this, but I'm keep over thinking and confusing myself with this question. How can I prove this equation? Needing help since not use to discrete math.(getting confuse, if I should be focusing on the probability or combination) also how can I remove the line from the fraction(this line: -)?


What is Hat matrix and leverages in classical multiple regression? What are their roles? And Why do use them?   Please explain them or give satisfactory book/ article references to understand them.


How does line of sight for spells work, accounting for familiars?

I had to make a call today and I'm wondering how this scenario should've gone down   The map was a U-shaped hallway; the party was on the lower left of the U, with the enemies on the upper right. The wizard has an owl familiar who could see an enemy caster, with the wizard seeing through the familiar's eyes, and the wizard was further back.   The enemy caster cast a fireball.  The player claims that since he was looking through the owl's eyes from his turn, he should technically have line of sight for a counterspell.   Could counterspell be cast in this case, even though there was a wall between him and the caster, and he was physically not able to cast towards the enemy caster?  Was I wrong in said judgement?


I've been trying to solve the exercise 7(a) of Velleman's "How To Prove It" and haven't succeeded. It asks the verification of the following equivalence:  $$ (P \to Q) \land (Q \to R) = (P \to R) \land ((P \leftrightarrow Q) \lor (R \leftrightarrow Q)) $$  While checking the website for help, I found a question posed by the user "yamad", who, despite his concern with a step futher on the resolution, came to this possible reduced form:  $$(\lnot P \lor Q) \land (\lnot Q \lor R) \land (\lnot P \lor R)$$  The problem is I couldn't even get to this step or any other simplfied form. I would appreciate if someone could provide me a hint.


Class vs Lib, different behavior in variadic template functions

Class  The following code works great (example taken from ):  class SomeClass { public:     void tprintf(const char* format) // base function     {         std::cout << format;     }      template<typename T, typename... Targs>     void tprintf(const char* format, T value, Targs... Fargs) // recursive variadic function     {         for (; *format != '\0'; format++) {             if (*format == '%') {                 std::cout << value;                 tprintf(format + 1, Fargs...); // recursive call                 return;             }             std::cout << *format;         }     } };  void main() {     SomeClass someClass;     someClass.tprintf("% world% %\n", "Hello", '!', 123); }   Lib  When I try to replicate this by making a lib of the SomeClass class i get an unresolved external symbol error:  SomeClass.h  class SomeClass { public:      void tprintf(const char* format);      template<typename T, typename... Targs>     void tprintf(const char* format, T value, Targs... Fargs); }   SomeClass.cpp  void SomeClass::tprintf(const char* format) // base function {     std::cout << format; }  template<typename T, typename... Targs> void SomeClass::tprintf(const char* format, T value, Targs... Fargs) // recursive variadic function {     for (; *format != '\0'; format++) {         if (*format == '%') {             std::cout << value;             tprintf(format + 1, Fargs...); // recursive call             return;         }         std::cout << *format;     } }   main.cpp  #include <ibppWrapper.h>  void main() {     SomeClass someClass;     someClass.tprintf("% world% %\n", "Hello", '!', 123); }   The unresolved external symbol error:  error LNK2019: unresolved external symbol "public: void __thiscall SomeClass::tprintf<char const *,char,int>(char const *,char const *,char,int)" (??$tprintf@PBDDH@SomeClass@@QAEXPBD0DH@Z) referenced in function _main   Conclusion  It seems like the linker is searching for a function in my SomeClass lib with the exact parameters:   SomeClass::tprintf<char const *,char,int>(char const *,char const *,char,int)    Whilst it should find or search for:   SomeClass::tprintf<T,... Targs>(char const *,T, ... Targs)   Questions  Is my conclusion correct?  Is this expected behavior?  Is there a Solution for this?


Exceptions lose part of stacktrace in try/catch context

I have two examples. In the first case, debugger catches the unhandled exception:   static void Main(string[] args) {     Exec(); } static void Exec() {     throw new Exception(); }   And the exception has full stacktrace:     at ConsoleApplication28.Program.Exec()     at ConsoleApplication28.Program.Main(String[] args)     at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)    at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)    at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()    at System.Threading.ThreadHelper.ThreadStart_Context(Object state)    at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)    at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)    at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)    at System.Threading.ThreadHelper.ThreadStart()   The second case:  static void Main(string[] args) {     Exec(); } static void Exec() {     try {         throw new Exception();     }     catch (Exception ex) {     } // Breakpoint }   At the breakpoint the exception has short stacktrace:     at ConsoleApplication28.Program.Exec()   Why stacktraces are cut to the containing method in the second case, and how to prevent it? I need full stacktrace for bugreports, otherwise it's not possible sometimes to find there the problem is, without full stacktrace.


I'm reading Thomas Calculus now but I don't think it includes Mellin transform or  Riemann-Stieltjes integration... Can you recommend an advanced calculus book which includes all of this stuff?


I'm looking for a proof of this theorem by Dirac:  If a graph is $k$-connected for $k \ge 2$, then for every set of $k$ vertices in the graph there is a cycle that passes through all the vertices in the set.  I know a proof probably uses Menger's theorem but I haven't been able to find one or come up with one.


Cannot understand this residuals plot in r

I am very new to r and statistics in general. I am trying to test for homogeneity of variance on a multiple linear regression model I have created, and as I understand this is done by checking residuals against fitted values.  However, the plot I get looks nothing like any of examples and I am thus having a lot of difficulty understanding it. Plainly the different strata in the plot are related to the fact that the response variable is an ordinal 11 point scale.  The model was obtained using:  model1<-lm(imtcjob ~ hinctnta + happy + eduyrs + icpdwrk + agea + gndr,         data=ESS7_GB)   then  plot(model1)


NTFS Read/Write Broken Under El Capitan?

I'm trying to enable macOS El Capitan's built in read/write support for NTFS, but it doesn't seem to be working. First of all; I'm aware it's not the fastest, and no officially supported, but my needs for it aren't critical (nor the data super important, it's just games).  Anyway, I've followed the usual guides to enabling support, and my /etc/fstab looks like:  UUID=E2E3FA2C-5B6D-4510-B4F6-E370A09B0AF6       none    ntfs    rw,auto,nobrowse   However, when attempting to mount the drive with diskutil mount disk0s9 I get the following error:  Volume on disk0s9 failed to mount If the volume is damaged, try the "readOnly" option   If I remove the fstab entry the volume mounts just fine in read-only mode, and under Windows I can confirm that it is undamaged. It's strange as this is the exact method I've used successfully in the past (not with the same partition though).  Here's the diskutil info output for the partition:  Device Identifier:        disk0s9 Device Node:              /dev/disk0s9 Whole:                    No Part of Whole:            disk0 Device / Media Name:      Windows_NTFS_Untitled_2  Volume Name:              Games  Mounted:                  No  File System Personality:  NTFS Type (Bundle):            ntfs Name (User Visible):      Windows NT File System (NTFS)  Partition Type:           Microsoft Basic Data OS Can Be Installed:      No Media Type:               Generic Protocol:                 SATA SMART Status:             Verified Volume UUID:              E2E3FA2C-5B6D-4510-B4F6-E370A09B0AF6 Disk / Partition UUID:    0C407B03-62D7-4C64-BC5C-3C57668C2F2E  Total Size:               249.2 GB (249152208896 Bytes) (exactly 486625408 512-Byte-Units) Volume Free Space:        0 B (0 Bytes) (exactly 0 512-Byte-Units) Device Block Size:        512 Bytes  Read-Only Media:          No Read-Only Volume:         Not applicable (not mounted)  Device Location:          Internal Removable Media:          No  Solid State:              Yes   In case it may be relevant; the partition was formatted natively by Windows 10.  The only suspicious thing to me is the device/media name of Windows_NTFS_Untitled_2, whereas for a Windows OS partition it is 'Basic data partition', but I'm sure that's important.  Any ideas why this isn't mounting in read/write mode? I had hoped to use built-in support to avoid having to install FUSE etc., which I assume still involves disabling system integrity protection?  Duplicate  This issue is not a duplicate as proposed; the other issue only asks how to enable read/write, however I already know how I'm supposed to be able to do it using the built-in driver, but am unable to do-so. In other words this question is asking why setting the rw option in /etc/fstab no longer appears to work (and how it can be fixed), rather than how can I get read/write support in the first place.  It is absolutely not an exact duplicate of the proposed original.


Can you say "are not we all?" instead of "aren't we all?"

Because "aren't" translates to "are not" I pose the question, can you use both interchangeably (in the context of "aren't we all?")? "Are not" sounds very grammatically incorrect in this situation. Can you say "you need not go there" as opposed to "you needn't go there"?   Basically, I thought you can say "you need not" instead of "you needn't" but that you can't say "are not" instead of "aren't" (in the context I've provided) because I've never heard the second.  My friend believes that if you can use one example interchangeably, you can use the other as well.  So,   Can you use example '1' interchangeably? Can you use example '2' interchangeably?


How to insert into a table with a column named 'when' and 'user'

How to programmatically insert a row/record into a table (generated by third party software) where one of the fields is named when and user which are coincidentally sql keywords.  The sql command is:  INSERT INTO APPT  (ApptID,Type,Descrip,When,Flag,User,DTS)  VALUES  (41,0,'Test Note','20/10/2014 1:42:00 PM',16,'AP','22/10/2014 8:24:01 AM')    Which gives the errors:  Error 156: Incorrect syntax near the keyword 'When'. Error 156: Incorrect syntax near the keyword 'User'.


If two vectors $\vec{A} =A_x\hat{i} + A_y \hat{j} + A_z \hat{k}$ and  $\vec{B} =B_x\hat{i} + B_y \hat{j} + B_z \hat{k}$,  have angle $\theta$  between them then the dot product (scalar product) of $\vec{A}$ and $\vec{B}$ is  $$\vec{A}\cdot\vec{B} = |\vec{A}||\vec{B}|\cos \theta$$  $$\vec{A}\cdot\vec{B} =\left(A_x^2 +A_y^2+A_z^2\right)^{1/2}\left(B_x^2 +B_y^2 +B_z^2\right)^{1/2} \cos \theta $$  $$A_x B_x+ A_yB_y+A_zB_z=\left(A_x^2 +A_y^2+A_z^2\right)^{1/2}\left(B_x^2 +B_y^2 +B_z^2\right)^{1/2} \cos \theta  $$  Can we mathematically derive the last equation from right to left or left to right?  Is there any proof stating  that the equation to be practically and mathematically true?


Distinguished open subset of intersection of two affine open subset

Suppose $X$ is a scheme, $\operatorname{Spec} A$ and $\operatorname{Spec} B$ are two affine open subsets such that their intersection, say $U$, is not empty. Then let $f$ be an element in $A$ such that $D(f)$ is contained in $U$, then we know $D(f)$ equal $\operatorname{Spec} A_f$. Now since $D(f)$ is also an open affine subset of $\operatorname{Spec} B$, can I find some $g$ in $B$ such that $D(f)$ equal $D(g)$ and $A_f$ isomorphic to $B_g$? If this is not sure, does a weaker statement that there exist some open cover of $U$ by distinguished open subset $D(f_i)$ such that there are $g_i$ in $B$ and $D(f_i)$ = $D(g_i)$ hold?


How to compute $\int_0^{+\infty} \frac{dt}{1+t^4} = \frac{\pi}{2\sqrt 2}.$

How to compute      $$\int_0^{+\infty} \frac{dt}{1+t^4} = \frac{\pi}{2\sqrt 2}.$$   I'm interested in more ways of computing this integral.   There is always the straight forward method to decompose into simple elements  $\dfrac{1}{(1 + t^{4})}$ it works but it is tedious. If someone has a faster and clever method, I'm interested :)  Update :   My quesion is different than  because all the solution that state there is talk about the the straight forward method to decompose into simple elements $\dfrac{1}{(1 + t^{4})}$ as i said before i'm not intersted in that way


I have slave setup and looks like it is running fine.  But does not replicate.  My Master is an IP of my Hosting and my slave in my Remote Server.  My BD master:  Variable    Valor File    mysqld-bin.000019 Position    120 Binlog_Do_DB    asistencias,caja,colegios,intranet,intranet2,papeletas,planillas,postulacion,resoluciones,visitas Binlog_Ignore_DB    mysql,test,app_convoca,intranetugel,moodle_ugel04,postfix,root_cwp,roundcube   My slave:   Variable    Valor Slave_IO_State  Waiting for master to send event Master_Host xxx.xx.xx.xxx Master_User esclavo_hosting Master_Port 3306 Connect_Retry   60 Master_Log_File mysqld-bin.000019 Read_Master_Log_Pos 120 Relay_Log_File  DB-01-relay-bin.000003 Relay_Log_Pos   284 Relay_Master_Log_File   mysqld-bin.000019 Slave_IO_Running    Yes Slave_SQL_Running   Yes Replicate_Do_DB  Replicate_Ignore_DB  Replicate_Do_Table   Replicate_Ignore_Table   Replicate_Wild_Do_Table  Replicate_Wild_Ignore_Table  Last_Errno  0 Last_Error   Skip_Counter    0 Exec_Master_Log_Pos 120 Relay_Log_Space 621 Until_Condition None Until_Log_File   Until_Log_Pos   0 Master_SSL_Allowed  No Master_SSL_CA_File   Master_SSL_CA_Path   Master_SSL_Cert  Master_SSL_Cipher    Master_SSL_Key   Seconds_Behind_Master   0   Show connected slaves  Mostrar esclavos conectados  ID del servidor Servidor 1      But it does not replicate


How to display the field history related list for a custom object on a Visualforce page?

I cannot find anything equivalent to:  <apex:relatedList list="ProcessSteps" />   which works for Approvals.  The only solution I can think of is to build a controller/extension that gets the raw history data (from MyObj__History) and write my own page elements to render it in a table. Is there a neater solution?


How to order citations by appearance using BibTeX?

By default (using the plain style) BibTeX orders citations alphabetically.   How to order the citations by order of appearance in the document?


Black holes and positive/negative-energy particles

I was reading Brian Greene's "Hidden Reality" and came to the part about Hawking Radiation. Quantum jitters that occur near the event horizon of a black hole, which create both positive-energy particles and negative-energy particles, produce the so-called Hawking radiation. However, I do not understand why only the negative-energy particles are being absorbed into the black hole, while the positive-energy particles shoot outward. Shouldn't there be 50/50 chance that each type of particle is being absorbed by the black hole? Also, the book mentions that a negative-energy particle would appear to an observer inside the black hole as positive. Why?


Want to show alert box for only 3 seconds

I want to show alert box only for 3 seconds (Means it show & hide automatically). I have search lot of in google but doesn't get answer. Any suggestion really appreciated.  I have done with new window but still finding solution with alert box.  Chk My code :  function fn() {     var w = window.open('', '', 'width=300,height=2px')     w.document.write('Product has been added to your Order List !')     w.focus()     setTimeout(function () { w.close(); }, 2000); }


How can I run blender from command line or a python script without opening a GUI?

I'm interested in using Blender for producing images, 3d files, or calculating geometry on a server.  Can I make blender run a python script without opening a GUI?  If not, can I incorporate Blender's python API into my own python script without running a GUI?


An illegal choice has been detected. after leaving form page

I have a form with only a select element and no submit button. Upon change, I issue an ajax call to retrieve the details of the selected Project. Everything works as expected, however after I leave the page, I see the error "An illegal choice has been detected. Please contact the site administrator."  I only get the error if I change the select input. Ex. if I navigate to:     Home->Projects->Home   I don't see the error on the last Home page. If i navigate to:     Home->Projects(change select input)->Home   I see the error on the last Home page.  Here is my module code:  class ExpeditionController extends ControllerBase {   public $client;    public function __construct() {     $this->client = \Drupal::service('http_client');   }     public function listProjects() {     $select_form = \Drupal::formBuilder()->getForm('Drupal\myModule\Form\ExpeditionSelectForm');     // Remove the submit button.     unset($select_form['actions']['submit']);      $result = $this->client->get('myRESTService', ['Accept' => 'application/json']);     $expeditions = json_decode($result->getBody());      foreach ($expeditions as $value) {       $select_form['expeditions']['#options'][$value->{'expedition'}->{'expeditionId'}] = $this->t($value->{'expedition'}->{'expeditionTitle'});     }      return array(       '#theme' => 'myModule_expeditions',       '#form' => $select_form,     );   }    public function expeditionDetail($form, $form_state) {     $expedition = [];     $response = new AjaxResponse();     if ($form['expeditions']['#value'] != "") {        $client = \Drupal::service('http_client');       $result = $client->get(         'myService' . $form['expeditions']['#value'],         ['Accept' => 'application/json']       );       $expedition = json_decode($result->getBody());     }      $response->addCommand(new HtmlCommand(       '#expeditionDetail',       array(         '#theme' => 'myModule_expeditions_detail',         '#expedition' => $expedition,       )     ));      return $response;   }    public function deploymentDetail($project_id, $deployment_id) {     $result = $this->client->get(       'myService' . $project_id . '/' . $deployment_id,       ['Accept' => 'application/json']     );      return array(       '#theme' => 'myModule_deployment_detail',       '#deployment' => json_decode($result->getBody()),     );    } }  class ExpeditionSelectForm extends ConfigFormBase {   /**    * {@inheritdoc}    */   public function getFormId() {     return 'myModule_expeditions';   }    /**    * {@inheritdoc}    */   public function buildForm(array $form, FormStateInterface $form_state) {     $form['expeditions'] = array(       '#type' => 'select',       '#title' => $this->t('Choose Project'),       '#empty_option' => $this->t('Select a project'),       '#default_value' => '',       '#ajax' => [         'callback' => 'Drupal\myModule\Controller\ExpeditionController::expeditionDetail',       ],     );      return parent::buildForm($form, $form_state);   }    /**    * Gets the configuration names that will be editable.    *    * @return array    *   An array of configuration object names that are editable if called in    *   conjunction with the trait's config() method.    */   protected function getEditableConfigNames() {     // TODO: Implement getEditableConfigNames() method.     return [];   } }


Something is setting IPSec policies and Firewall Rules. How can I find it? (Windows 2008R2)

Something on the server is automatically adding Deny rules on port 445 and a couple other ports. The rules are appearing in the Firewall and IP Security policies. They are blocking network and printer sharing.   I have tried renaming, disabling, deleting the rules/policies but they come back on their own.  I have done virus scans on 3 different AV programs (Windows Defender, Kaspersky, Malwarebytes) and they have come back clean. I've uninstalled ALL unnecessary programs. I have check ALL scheduled tasks, and they are appropriate. I have checked ALL startup tasks (Startup folder and registry run/runonce), nothing in them. There are no GPO's set. No VNC/RDP services, so it's not someone doing it manually.   I've been able to stop the rules/policies automatically being added by setting the Permission in the registry folders of the Firewall rules and IP Sec policies to (Everyone to Deny creating/changing/deleting).  How can I pinpoint what is setting these rules/policies?!? The event viewer simply says the Local Service user used netsh to create the rules, but no details on where netsh was called. Nothing in the even viewer about IP Sec policies, but I've recently enable auditing, but nothing in there helps.


How to create a PATH environment variable for Android Studio?

I am a newbie and have no idea about linux or ubuntu. I have successfully installed Android studio but have problem in opening it. The developer site instructs to add PATH environment variable but I don't even know what it means.  I have extracted android studio to home and additional folders - Android and AndroidStudioProjects created by the system after installation of android studio.  Prefer layman language if possible and step-by-step instructions.


One root common to $ax^2+2bx+c=0$ and $dx^2+2ex+f=0$

If three distinct numbers $a,b,c$ are in GP, and the equations $ax^2+2bx+c=0$ and $dx^2+2ex+f=0$ have a common root, then which of the following statements is correct?  $1.$ $d,e,f$ are in GP.  $2.$ $d,e,f$ are in AP.  $3.$ $\frac da,\frac eb, \frac fc$ are in GP.  $4.$ $\frac da,\frac eb, \frac fc$ are in AP.  My attempt: Let $r$ be the common ratio in $a,b,c$. So, $b=ar, c=ar^2$. So, the first equation becomes $ax^2+2arx+ar^2=0\implies x^2+2rx+r^2=0$. Let $\alpha$ be the common root. So, $\alpha^2+2r\alpha+r^2=0$. Also, $d\alpha^2+2e\alpha+f=0\implies \alpha^2+2\frac ed\alpha+\frac fd=0$. On comparing, I get $r=\frac ed, r^2=\frac fd\implies(\frac ed)^2=\frac fd\implies e^2=fd$. So, I am getting option $1$ as correct. But the answer is given as $4$. What's my mistake? While  indeed has a lot of good answers, my question was about my mistake in the method I followed. Scilife has answered that in the comments below.


What's the way to calculate the following integral $$\int_0^{\infty}\frac{\cos x-e^{-x}}{x}\,dx?$$ The answer is zero. I tried to split into two integrals $\int_0^{\infty}\frac{1-\cos x}{x}\,dx$ and $\int_0^{\infty}\frac{1-e^{-x}}{x}\,dx$ but they both don't exist. Integration by parts failed for the same reason: integral and one of the limits don't exist.


I have an exectuable that only opens with text editor from Nautilus

When I use the command prompt and type ./myprogram it executes just fine, but when I try to click on the executable in nautilus it just opens the text editor. I turned on the executing permissions in the properties window but still no good. Any idea's what my issue is.  Running Ubuntu 20.04 recently upgraded


How to make sure I'm not using any proprietary software after installation?

I know I can check the currently installed non-free software with the following command (assuming aptitude is FOSS):  aptitude search '?installed (?section(restricted) | ?section(multiverse))'   And I can remove the "restricted" and "multiverse" sources (and not add any PPA's) to keep that list empty. I'm assuming from this point, whenever I apt install something, that something is either in the allowed sources or it is not found.  Is this enough? Does this make sure all software I'm running (in Ubuntu) is open-source?


I was looking for a file in my source and tried both locate and find. Surprisingly locate was searching in entire machine and was faster than find, which was searching only in current directory and sub directories.    Here are my shell commands for both:  find . -name vendorsetup.sh # takes 50 seconds to search all files in curren -sub directories.  locate vendorsetup.sh # takes 20 seconds to search file in whole machine.   Why this?


vacuum sealed kielbasa in a hot car for 18 hours - is it still good?

I bought vacuum sealed kielbasa yesterday about 6:30 pm. It must have fallen out of the bag in my very hot car and I didn't notice until about 11:45 the next day...Is it still good?


Database structure for holding statistics by day, week, month, year

I have to collect statisctics by days, weeks, months and years of user activity for a site. I am the DB design stage and I wanted to do this stage properly since it will make my coding life easier.  What I have to do is just simply increment the values in the fields by 1 in the DB each time an activity happens. So then I can pull up the date by each day, each week, each month and year. How should my DB be structured? Apologies if this is a simple question for most. It would also be great if this structure could be extendable so that it can be broken down by other categories.  The bit am having trouble with is each month is made up of more days and these days change each calender year.  Thanks all for any help or direction.  Other info: Linux Machine, making use of PHP and MySQL


Converting lines into closed polygons in inkscape

I've traced an image (in this case, grand canyon) and it composed of several individual line segments. But now I want to give each of the closed shapes (again, not closed shapes, it just seem like it) a different fill color.  Is there any way I can close the shapes and convert them into polygons?   Earlier post did not answer my question ()


This is a very hard functional equation.  the problem is this :  find all functions $ f : \mathbb{R} \rightarrow \mathbb{R} $ such that : $ f(f(x))=x^2-2 $  to solve it i have no idea! can we solve it with highschool olympiad education?  please help : )


tikz: get rectangle borders to overlap rather than touch

I want some rectangles that are adjacent to each other in a line. Almost got it, but the rectangles have borders which touch, and I want the borders to overlap. Is there a way to do this?  \documentclass{standalone} \usepackage{tikz} \usetikzlibrary{arrows} %%%< \usepackage{verbatim} \usepackage[active,tightpage]{preview} \PreviewEnvironment{tikzpicture} \setlength\PreviewBorder{5pt}% %%%> \title{boxes1} \tikzset{   >=latex,   font=\sffamily } \begin{document} \begin{tikzpicture}  \coordinate (pen) at (0,0); \foreach \x [count = \xi] in {0.1,0.2,0.1,0.1} {   \node[rectangle, thin, draw, anchor=west, minimum width=\x*3 cm](rnode)at (pen) {\xi} ;   \coordinate (pen) at (rnode.east); } \end{tikzpicture} \end{document}


Unknow column ''first_order' in where clause

Below I have my SQL query from Prestashop. The error is: Unknown column 'first_order' in 'where clause'.  SELECT SQL_NO_CACHE SQL_CALC_FOUND_ROWS a.`id_order`, `reference`, `total_paid_tax_incl`, `payment`, a.`date_add` AS `date_add` ,  a.id_currency, a.id_order AS id_pdf, CONCAT(LEFT(c.`firstname`, 1), '. ', c.`lastname`) AS `customer`, osl.`name` AS `osname`, os.`color`, IF((SELECT COUNT(id_customer) FROM `ps_orders` so LEFT JOIN ps_order_state ost ON ost.id_order_state = so.current_state WHERE so.id_customer = a.id_customer AND NOT ost.id_order_state = 6 AND NOT ost.id_order_state = 7 AND NOT ost.id_order_state = 8) = 1, 1, 0) as first_order, IF((SELECT so.id_order FROM `ps_orders` so WHERE so.id_customer = a.id_customer AND so.id_order < a.id_order LIMIT 1) > 0, 0, 1) as new, country_lang.name as cname, IF(a.valid, 1, 0) badge_success FROM `ps_orders` a  LEFT JOIN `ps_customer` c ON (c.`id_customer` = a.`id_customer`) LEFT JOIN `ps_address` address ON address.id_address = a.id_address_delivery LEFT JOIN `ps_country` country ON address.id_country = country.id_country LEFT JOIN `ps_country_lang` country_lang ON (country.`id_country` = country_lang.`id_country` AND country_lang.`id_lang` = 6) LEFT JOIN `ps_order_state` os ON (os.`id_order_state` = a.`current_state`) LEFT JOIN `ps_order_state_lang` osl ON (os.`id_order_state` = osl.`id_order_state` AND osl.`id_lang` = 6)  WHERE 1   AND `first_order` = 1  ORDER BY a.`id_order` DESC  LIMIT 0, 50   I'm working at MySQL 10.1.23-MariaDB. Thanks for any help.


Set image to full all available space in Beamer (without overlapping other elements)

I want to have an image take up as much as possible of the content area in a beamer presentation, without overlapping the title, the sidebars, or the footers. How can I achieve this?  The code below gives an example of what goes wrong using \includegraphics and setting the width and height from \textwidth and \textheight -- if you try it, you'll see that the footer at the bottom is covered.  One can, of course, do something like height=0.9\textheight but that is annoying and not particularly robust if one changes themes... I'm looking for a more elegant solution.  \documentclass{beamer} \mode<presentation>{   \usetheme{Marburg} } \usepackage[utf8x]{inputenc}  \begin{document} \begin{frame}{Header}{Sub title}   \includegraphics[width=\textwidth,height=\textheight]{tmp.jpg} \end{frame} \end{document}


I'm having some problems with GdalTools on QGIS 1.8, with MacOsx 10.8: I've the GDAL complete library 1.9 but ECW is still a not supported format.  What should I do?


Is diamagnetism a static or dynamic effect?

When we put a diamagnetic material in the presence of an external magnetic field $\vec B_0$, the magnetic field inside the material decreases to $$\vec B=(1+\chi_m)\vec B_0,$$ where the magnetic susceptibility $\chi_m$ is a small negative number. I am assuming the material is linear and isotropic.  On the other hand the diamagnetism is explained in terms of Lenz law. When we change the magnetic flux of the external field over the material, atomic currents generate an induced magnetic field trying to restore the flux. But then the induced field could have any sign (in the appropriated direction), depending if we are increasing or decreasing the flux of the external field. It seems diamagnetism is a dynamic effect. How come the sign of $\chi_m$ is always negative? Moreover, the magnitude of $\chi_m$ should depend on how large is the variation of the flux but I do not see any suggestion of this when looking at tables of $\chi_m$.


upgrade from Ubuntu 8.04 LTS with an old computer

I have an old Dell Latitude D610, 500MB RAM, and a 11 GB partition available for Linux (a 30 GB partition is full with data, and on a 15 GB partition I still have Windows). I have it still running on 8.04 LTS. As this is no longer supported I would like to update it. Upgrading to 10.04 LTS failes as it askes me for 5 GB of free disk space which I don't have. What options do I have with my computer and how should I proceed?


How to calulate mosfet response time with load?

I would like to calculate the response time of a PMOS circuit and of the circuit  Could you tell me how to do it?    I'm using this transitor.   I tried to use the rise time of the PMOS to find it can switch (and i don't know if that's the good way), but I don't now the results with the load. CL en RL. I assume CL at t=0ms is equal to 0V. I tried to use dv/dt, but I failed VIN1 = 28V. VCMD is a command  Thanks.  edit: I made a mistake. The Zener is also connected to the source. Sorry


My question is the following : is this following code correct :  class A {}; // no virtual destructor  class B : public A{     std::unique_ptr<int> ptr{new int(5)}; };  // in main std::unique_ptr<A> = new B;   It will probably have some compilation errors, but it is just to understand the concept. Will the pointer be correctly deleted (I mean ptr will be deleted?) or do we need virtual destructor to ensure that


If G is a graph containing no loops or multiple edges, then the edge-chromatic number $X_e(C)$ of G is defined to be the least number of colours needed to colour the edges of G in such a way that no two adjacent edges have the same colour.  How to find edge-chromatic number :  1)Complete Graph($K_n$)  [I know $k_n$ is (n-1)regular and if n is even then edge-chromatic number of $k_n$ is n-1 and if n is odd then edge-chromatic number of $k_n$ is n,but how to prove it??]  2)Wheel($W_n$)


What items can a player teleport into the Goblins vs. Gnomes board?

Hearthstone has a variety of themed game boards. Each board features various interactive components and Easter Eggs. Among other things the Goblins vs. Gnomes board features a teleportation chamber that seems to be controlled by the position of the levers to the left of the chamber. Does the position of the levers effect the items which will be teleported? What items can a player teleport into the chamber?


Chance of selecting the last k pages in correct order from a set of n pages

I have a set of documents numbered 1 to n. If I arrange the documents randomly, what is the chance of selecting the last k pages in the correct order if I select them at random from the documents?   Because order is important, I use the following formula:  $\displaystyle\frac{n!}{(n-k)!}$  From this I calculate how many ways there are to select k pages from n pages in the correct order. I need to have the last k pages. Which I can do in only one way. So is the chance   1/$\displaystyle\frac{n!}{(n-k)!}$?   It seems unlikely. It seems to me spontaneously that the chance should be smaller.


Why can two particles in a box have different quantum numbers and still be indistinguishable?

I'm reading from the "Modern Physics" textbook by Randy Harris.  I'm Chapter 8 on Spin and Atomic Physics, and the book has just introduced how to solve for the wave function of 2 particles in a box. The two particles are identical, and can have different quantum numbers. They do not interact.  From there they go on to explain why we use symmetric and antisymmetric wave functions, because we can't be able to tell which particle is which from the probability density equation, which we ARE able to without using the symmetrical requirement if the two particles have different quantum numbers.  My question is, why can't we distinguish between two particles with different quantum numbers? Doesn't that mean they have different energies, and as such have different wave forms and so appear in different places? The problem used in the book is that the two particles are in a box. But because of their different quantum numbers, one of the two particles can't be found in the middle of the box, while the other can. This should never be the case apparently, so they introduce the symmetrical requirement.  As stated above, I'm confused as to why we're not supposed to be able to tell two particles with different quantum numbers apart.  Thanks for your time.


I'm trying to produce a CV. I'm using Latex and Python, so I can edit the underlying text document with my material easily and the finished cv will come up adjusted for the contents of each section.   I read that longtable cant paginate in the middle of a cell, so when I try and do an itemized list, it won't break up and I end up with a lot of whitespace at the bottom of one page and the whole list on the next.  How can I split the list? Is there another package I can use?   In the final program PdfLatex will be called by python on a calculated script. If I could find out what the overspill was I could force Python to produce two lists. Is there such a variable and how do I access it?  Thanks & MWE below  \documentclass{article} \usepackage[left=0.5in,right=0.5in,top=0.5in,bottom=0.5in]{geometry} \usepackage{colortbl} \usepackage{enumitem} \usepackage{amssymb} \usepackage{longtable}  \newcommand\T{\rule{0pt}{4mm}} \pagestyle{empty} \begin{document}  %\renewcommand{\arraystretch}{1.2}  \begin{longtable}{|>{\columncolor[gray]{0.9}}p{0.15\linewidth}|p{0.80\linewidth}|} \hline\T \textbf{Summary} &  \makebox[2cm][l]{Blah:} Blah \\[2ex] & \makebox[2cm][l]{Blah:} Blah\\ & \makebox[2cm][l]{} Blah \\ & \makebox[2cm][l]{} Blah\\[2ex] & \makebox[2cm][l]{Blah:} blah\\ & \makebox[2cm][l]{} blah \\ \hline\T \textbf{Blah} &  \begin{itemize} \renewcommand{\labelitemi}{$\Box$} \vspace{-1em} \itemsep0ex \item Blah \item Blah \item Blah \item Blah \item Blah \item Blah \item Blah \item Blah \item Blah \end{itemize} \\ \hline\T \textbf{Blah} & Blah\\ & \textit{Blah} \\ & \textit{Blah} \\ & \begin{itemize} \renewcommand{\labelitemi}{\textendash} \vspace{-1em} \itemsep-1ex \item Blah \item Blah \item Blah \item Blah \item Blah \item Blah \item Blah \item Blah \item Blah \end{itemize} \\ \cline{2-2}\T & Blah\\ & \textit{Blah} \\ & \begin{itemize} \renewcommand{\labelitemi}{\textendash} \vspace{-1em} \itemsep-1ex \item Blah \item Blah \item Blah \item Blah \item Blah \item Blah \item Blah \item Blah \end{itemize} \\ \cline{2-2} \end{longtable}  \end{document}


Outlook: scheduling recurring out-of-office?

In Outlook, is there a way (or an add-on that can do it) to schedule a recurring out-of-office message?  I work 4 10's, so I'm out of the office every Monday, and it's a bit of a pain to have to reset my out-of-office message every single week.


how to generate a new .desktop file (in /usr/share/applications) after installation?

I've just install wine in my Xubuntu 18.10 with the command "sudo apt install wine" but there's no shortcut in my menu.  I checked the /usr/share/applications, there's nothing there too.  Is there a way to generate that file. Try to uninstall/reinstall it with the softwares application or via synaptic but with no more success.  As I use Ubuntu/Xubuntu for 11 years, I found an alternative way to launch sketchup without anything in my menu but I think it should be fixed for the beginners.  Edit: The answer is not only to make a launcher. But the apt install program didn't create anything in the menu. I don't have neither the right clic option "open with wine..". I would like to have an integration of wine as usually in Xubuntu. It doesn't work for the 18..10 version.


The maximum number of active participants HAS exceeded or IS exceeded?

For the following text:  The input shows an invalid red error box if the maximum number of active participants ___ exceeded.  What should go in the ___ ?  Some options that I can think of are:   Is Has   I am curious if there is an option above that is incorrect grammatically?


Taking screenshot of a specific area from the command line

I am running Lubuntu desktop 12 and I am looking for a tool that can take screenshots of a certain area from the command line.   I have tried out Shutter. It works but, when I run the command  it generates warnings ( Wnck-WARNING **: Unhandled action type). I think the tool might be designed to run under GNOME and might not be compatible with Lubuntu. The screenshot is taken successfully, but the command hangs, which is something I cannot work with.  So what is a good screenshot tool that    Runs from the command line Can capture a certain area of the desktop     I like to add that scrot, the tool Lubuntu ships with, does not have the option to crop certain coordinates, but only an interactively user-defined area which is not what I'm looking for.


Why does this user's picture keep changing?

One of the more active  on one of my sites has an issue with his user-picture. Namely, it keeps changing on us, and it's really annoying.       I've , and , and his  was  @Shokhet I have no idea! I thought i noticed something funny going on with the pics. You didn't believe me when I told you technology and i don't get along, did you? Now you believe me?  Can we please get this fixed? It's really annoying, as I use those profile pictures to help me quickly identify who posted what, and 6591 is one of the really good guys.


Why Was It 'Essential' That Voldemort Kill Harry Potter?

‘So the boy ... the boy must die?’ asked Snape, quite calmly.   ‘And Voldemort himself must do it, Severus. That is essential.’   Deathly Hallows - page 551 - UK Hardcover - chapter 33, The Prince's Tale   Dumbledore tells Snape it is 'essential' that Voldemort be the one to kill Harry, I'm assuming in order for the piece of Voldemort's soul in Harry to be properly killed as well.  But why?   Hermione destroyed the Hufflepuff cup; Ron destroyed the Slytherin locket; Neville killed Nagini; Harry destroyed the diadem and Tom Riddle's diary. So the Horcruxes were not immune to destruction at the hand of someone other than Voldemort. And as it ended up, Harry himself wasn't even a Horcrux, but rather just an unknowing host to a parasitic bit of Voldemort's soul.   Why was it 'essential' that Voldemort be the one to kill Harry in order for the piece of Voldemort's soul to die?


Given the recursive sequence:$x_1=1$ and $x_{n+1}=\frac{1}{3}(x_n+\frac{3}{x_n})$, prove that it is a Cauchy sequence and find its limit.

I've been busy trying to answer this question for several hours now and I've thought of looking for when it is eventually increasing or decreasing, but it doesn't seem to ever be either. It came with the hint that $x_n\geq 0$ and $1\leq x_n^2\leq 3$ for all natural numbers n. I understand that the limit would be $\sqrt{\frac{3}{2}}$, but showing that the sequence is Cauchy is the part I'm struggling with. Please help.


Show that $A\in\mathbb{C}_n$ is normal $\iff$ $tr(A*A) = \sum_{i = 1}^n|\lambda_i|^2$, where $\lambda_1,...,\lambda_n$ are the eigenvalues of $A$.

Title restated: Show that $A\in\mathbb{C}_n$ is normal $\iff$ $tr(A^*A) = \sum_{i = 1}^n|\lambda_i|^2$, where $\lambda_1,...,\lambda_n$ are the eigenvalues of $A$.  This question comes from "Matrices and Linear Transformations" by Charles Cullen. I'm studying for an exam and am trying to do some problems but I'm having trouble with this one. Any help would be appreciated.  Thank you.


Disable monitor going into sleep Ubuntu Desktop 16.04 LTS

Is there any way to disable the monitor going into sleep for Ubuntu Desktop/Server 16.04 LTS.  The internet is full of suggestions, i've tried them all but none work  Edit:   None of the solutions provided by the above link work for Ubuntu 16.04.


Remove or hide magazines from the Software Center

I just started using Ubuntu again (after using Max OSX for 2 years), and the one thing that bothers be about it are the magazines spamming the software center.  Is it possible to totally remove them from the listings?


What are the 'critical' values of skewness and kurtosis for normality assumption?

I am analyzing buy-and-hold abnormal returns of stocks (dependent variable) using OLS regression. These returns, however, tend to be positively skewed (and are so in my case).  The residuals obtained by OLS are slightly skewed (skewness of 0.921 and kurtosis of 5.073).   Although the histogram of residuals looks quite normal, I am concerned about the heavy tails in the qq-plot. Is it valid to assume that the residuals are approximately normal or is the normality assumption violated in this case?   I already tried to transform the dependent variable using log-modulus and cube roots (as there are negative values) in order to get a smoother qq-plot, but did not get improved results.


Query multiple custom post types in single loop

I'm aware there are several other posts that cover similar ground to what I'm about to ask.  I have three custom post types running, in addition to 'posts'. I want to run a loop that pulls all posts categorised under a particular category   <?php           $args = array(     'post_type' => 'testimonial',     'posts_per_page' => 1,     'tax_query' => array(         array (                  'taxonomy' => 'testimonial_category',                 'field' => 'slug',                 'terms' => 'home'     ) ) ); $query = new WP_Query( $args );                 $postcount = 0;             ?>             <?php if ($query->have_posts()) : ?>                 <?php while ($query->have_posts()) : $query->the_post(); ?>                     <?php $postcount++; ?> //loop here <?php wp_reset_query(); ?>      This is the code I have at the moment, not sure how I condense this into pulling in multiply post types from one category.


Johannesberg to Heathrow to Cork: does baggage go straight through? Do I need transit visa?

I am travelling from OR Tambo International, Johannesburg South Africa on Virgin Airlines on 15 December 2017, arriving at Heathrow 16 December 2017.  Three hours there and then on to Cork with Aer Lingus.  Can I book my bags in at Johannesburg to go straight through to Cork (although I travel with two different airlines) and do I need a in transit visitors visa at Heathrow?  Also departing 2/1/18 from Cork to Heathrow with Aer Lingus and 5 hours then I board Virgin Airlines to South Africa.  Same questions.


Does a polymorphed creature remember who his friends are?

The polymorph spell states, in part:     The target’s game statistics, including mental ability scores, are   replaced by the statistics of the chosen beast. It retains its   alignment and personality.   Does retaining its personality suffice to let it remember who its allies are?  Even if transformed into something stupid like a T-rex?  What does it even mean for a beast with Int 2 to have someone's "personality"?


Do I need to worry about defragmentation?

I am new to Ubuntu (and Linux in general, as a home installer/user). Do I need to worry about fragmentation of the file system on a Linux partition on one's hard drive?


I'm trying to run the latest Scilab with Lubuntu 14.04, and I get an error "Mesa 10.1.3 implementation error: Incomplete OpenGL ES 2.0 support"  This is on a 10 year old Dell Dimension 8300 with all the original stuff.  The card is reported in the "Software & Updates" program "Additional Drivers" window as an NVIDEA GeForce FX 5200.  I've tried this both with the X.Org X server driver, and the NVIDIA Legacy binary driver.  The result was the same both ways.  Clues for the clueless would be much appreciated here.  Thanks.


How to create function that returns all combinations of this list in Python?

I have this kind of list:  [['I'],['want','love','like'],['cat',dog]]   and I want to create a function that can return all combinations of words in the lists like this:  [['I'],['want'],['cat']] [['I'],['love'],['cat']] [['I'],['like'],['cat']] [['I'],['want'],['dog']] [['I'],['love'],['dog']] [['I'],['like'],['dog']]   PS: The function must work with any n words


how to select a unique record in a table which has no key constraints

I had a table named uniq_select_records with the following columns:  sno number,  item_name varchar2(50), start_date date,  end_date date,  action_flag char(1), last_modified_date date,  creation_date date   sno is a column which I used to identify a row for a item_name and it is not unique or primary key but it was not null. sno will be present for each item. no of items is equal to no of sno. sample  sno item_name start_date  end_date Action_flag last_modified creation_date --- --------- ----------  -------- ----------- ------------- ------------- 1   sample1   02-MAY-15  27-MAY-14    A        07-MAY-15        02-MAY-15 1   sample1   02-MAY-15  27-MAY-14    D        07-MAY-15        02-MAY-15 1   sample1   27-APR-15  06-JUN-14    C        07-MAY-15        02-MAY-15 1   sample1   27-APR-15  06-JUN-14    C        07-MAY-15        03-MAY-15 2   sample2   07-MAY-15  11-FEB-15    C        07-MAY-15        22-JAN-15 2   sample2   07-MAY-15  11-FEB-15    A        07-MAY-15        22-JAN-15 2   sample2   07-MAY-15  01-FEB-15    C        12-MAY-15        12-MAY-15   Action flag values C=change, D='Deleted and A=insert sample data is shown above. like this we have millions of records. now we have to select the to record which had the latest change for each item. each item may have its own start_date and end_date.All the items weren't modified on the same date.  Can anyone suggest idea how to fetch the records for each item which are latest change for an item.  thanks in advance.


euler function property $\varphi(n)\geq\sqrt{n}$

How to prove that $\varphi(n)\geq \sqrt{n}$  for every positive integer $n$ distinct of $2$ and $6$.


Why the value of 0.1 +0.2 0.3 in python is not zero?

I tried to do this in python3, not sure why the answer is not zero 0.1+ 0.2 -0.3 = 5.551115123125783e-17


To provide dimensionality reduction, 1x1 convolutions are used, before passsing them through a 3x3, or 5x5 convolution in an Inception module.

To my understading what a 1x1 convolution does is gives an embedding of the (i,j)th entry of the feature map along its depth. Besides here some dimensionality reduction is also done. How will the scenario change when we have 5x5 or 3x3 convolution done followed by a 1x1 convolution. I know that the number of computations will blow up. But is their some other point that I am missing?


Why is the infinite sphere contractible?  I know a proof from Hatcher p. 88, but I don't understand how this is possible. I really understand the statement and the proof, but in my imagination this is weird.  Thanks for your help.


Why are there no notifications for chat messages?

Why are there no notifications for new chat messages? Or do I only get notifications when I stay in a chat room? If so, why do I leave a chat room automatically when I navigate away from the chat room site?


Schema for large amount of machine's sensor data variables

I plan to do a database for more machines. Each machine will have multiple sensors mounted that store data like temperature, current, power, fault, manual mode and so on every minute. Each machine consists of multiple parts and the same data sets are stored for each part.  Every part may be divided into two subparts and each part/subpart can have multiple sensors for temperature. So in reality system can cosists of six parts, only part five has two subparts. Each part or subpart has one sensor for a variable stored except temperature. So for example part1 will have one variable for power, current, voltage, manual mode but can have multiple sensors for temperature.  There can be a system with more than 500 variables recorded every minute, and each variable type has a different type of value, e.g., some are integers, some are floats with one decimal some with two decimals. I can't setup one column for this. That's why I want to make the best structure possible but I have never really performed database design since I have always used only simple tables with small data.  I just don't want to make a table with 500 or more columns since I suppose that is not a good idea.  I would do something like this:  sensor_name, type, value, timestamp   I know according to the sensor name from what part/subpart is the reading.  However, with a large machines this table will have like 500 rows for every minute.   Thank you for every idea sugested.


Having a problem with document.getElementById in IE 11 to retrive a div  who has a long url as id.   Example :

   I am getting a null, but the id is unique.  Works as expected on Google Chrome.  Where is the fault ? Special characters?  PS: It works fine for a simple id :


can not find correct grammar for the use of : the... the

I am writing someting in MS word and it underlines what I wrote in green which means it sees grammar mistake but i can not see it. Please help  The sentence is:  The larger the area, the more water to be drained.  What is wrong with this? if it is wrong can you write the correct sentence?


How do processes, jobs and session relate to each other ?

Could you deliver an answer in a way that does not require too much special knowledge in advance, yet also deliver some deeper insight to a lesser advanced Linux User ?


alias using `$1` and fallback default value prints both the param and the fallback value

I want to create an alias that can handle parameters ($1), and can fall back to a default value if a parameter is not provided.  For example, $ alias foo='NUM=${1:-42}; echo $NUM'  Invoked without params it works as I want: $ foo 42  But invoked with a param, it prints both my value and default value: $ foo 69 42 69  I don't understand why it's this way. How should it be done properly?  How can I debug this kind of problem myself?


How can I cut off steel clothes line poles?

What would be the best way to cut a old clothes line pipe? Believe it is steel not sure It is very sturdy and old.


How to create a local repository using apt-mirror and mirrorkit?

Having a local repository can be very useful. It is possible to use rsync to create a repository mirror, but this results in all the releases being downloaded, even older ones and would include files for architectures that might not be needed.  apt-mirror allows one to selectively choose parts of the repository. mirrorkit provides a front-end to apt-mirror.  What is the best way to create a local repository mirror for selected parts of the Ubuntu archives?    For example, one might wish to include:   Main, Restricted, Universe, Multiverse,  All Ubuntu and Lubuntu but exclude other derivatives, such as Kubuntu and Xubuntu. Only AMD64 and i386 but exclude other architectures. Only Trusty Tahr, but not Precise Penguin or Utopic Unicorn.   One might wish to configure the process so that it downloaded from a local mirror, rather than the main archives.  How can I create local repository using apt-mirror and mirrorkit for a selected architecture, release, or Ubuntu variant?


What does "meta" mean for this kind of forum?

I do not know if it should be asked here, but I've always wondered what "meta" means for this forum. Why not "para" from "paranormal", for example?  I participate on a lot of StackExchange (SE) forums and I saw some Meta forums associated with them.  My question is just about the significance of the term "meta" for these associated forums.  Is it about the transcendence of subjects of questions made on Meta forums in relation to normal forums? Is the subject beyond the scope of subjects from normal forum? So is it like "hiper"?


I want to understand very deeply the meaning of the work integral formula:  $$ \int m\frac{d\bar{v}}{dt}d\bar{l} \, .$$  It is not enough for me to know that it was defined in this way, I want to know why it was defined in this way. My intuition says that is due to the conservation of energy, however I don't fully understand the meaning of this term.  To start, what is the physical meaning of $m\frac{d\bar{v}}{dt}d\bar{l}$, what we are looking for when we calculate it?


Does the view counter count repeat visits?

Does the view counter at the side of the page show unique visitors or add a visit everytime then return to the page. Does it count the asker?


Does Samba work well with Windows when case-sensitive names are enabled?

I want to have a *nix Samba share accessible by Windows clients.  Samba has an option to enable or disable filename case-sensitivity. Normally for windows access, this is disabled, so that fred==FRED=fReD.  However, this leads to one major gotcha, AFAICT:   On unix, you create two folders called "RODDY" and "roddy"  On Windows, you'll see both of the folders, but...  When you delete/rename/open one from Windows, you could end up deleting/renaming/etc either of them. You have no way of knowing which!.   So, my question is, how does Samba behave on windows if the case-sensitive flag is set "ON"? Can a user still see both folders, and have file operations work in a consistent manner?


I am not sure about my answer. I think that the cup of tea cools down by the following modes:   Radiation between the surface of the tea and the air molecules. Conduction between the tea and the cup itself and between the cup and the table or whatever the surface is.   Do you think it is correct?


command to zip multiple directories into individual zip files

I have a single directory that contains dozens of directories inside of it.  I'm new to command line and I'm struggling to come up with a command that will zip each sub-directory into a unique sub-directory.zip file.  So in the end my primary directory will be filled with all of my original sub-directories, plus the corresponding .zip files that contain the zipped up content of each sub-directory.  Is something like this possible? If so, please show me how it's done.


What does "not constructive" mean, and how does it differ from "too chatty"?

When flagging a comment to be deleted, the possible flags are  "rude or offensive", "not constructive", "obsolete", "too chatty", and custom.  I'm trying to figure out what "not constructive" means in this context. AFAICT, there are two possibilities:  The comment is not particularly constructive. It doesn't add anything. In other words, roughly, it doesn't do what comments should do, viz attempt to clarify or improve the post or add relevant information. The comment is destructive. (In this view, "not constructive" is an instance of litotes, like "he's not very smart" to mean "he's quite stupid".)  Which leads me to three questions:  Which of those is the correct reading? If (as I suspect and as ) #1 is correct, then how is "not constructive" different from "too chatty"? They seem like synonyms. If (as ) #2 is correct, then can the flag be reworded from "not constructive" for clarity, please?


How do I remove a file with 2 hypens in the name, like --karmic.list

How can I read, write, or delete a file which has a name beginning with a pair of hyphens?  In my /etc/apt/sources.list.d/ there is a set of files whose name starts with --karmic.list .  When I try to rm or vim from the command line, it considers it as argument and reports as unknown arg.  How can I deal with this?  How is it possible to select a file with this kind of name?


How do I fix the sound of my game when I start a Skype call?

Whenever I am playing a game, and I call my friend on Skype, the sound on my game goes super low, to where I can barely hear it, and it remains the same all through the Skype call. However, though, when I end the call, my sound goes to normal again. Is there a way to fix this?


Java installation in Ubuntu for topcoder

Can someone help me with an issue? I want to do TopCoder. It needs a Java applet. I'm new to ubuntu, have the 13.04 version and have no idea how to get Java installed and which version of it should I get for the applet? Please suggest what to do. Thanks in advance.


When I insert a cd in drive, it starts up the Parole Media Player.  How do I change that so the VLC Media Player, which is installed on my PC, becomes the default player?


Do black holes cause gravitational redshift?

Suppose a light ray is emitted by a light source very close to the black hole's singularity away from the black hole's gravitational center. Why won't the light escape? Shouldn't the massive gravity of the black hole just cause massive redshift in the light ray? How does it pull it back? I know there might be many questions similar to this but I just need a basic answer for the redshift part. I understand that if a light ray is passing nearby the black hole, then it bends and gets pulled inside. But what if the light is going perpendicularly away from the black hole? The source is inside the event horizon of course. Otherwise this is just a normal case.


The set of points where two maps agree is closed?

Let $f,g\colon X \to Y$ be continuous maps. Let $Y$ be Hausdorff. Is the set $$A := \{x\in X \, : \, f(x)=g(x) \}$$ necessarily closed ?


Counting the number of propagating degrees of freedom in Lorenz Gauge Electrodynamics

How do I definitively show that there are only two propagating degrees of freedom in the Lorenz Gauge $\partial_\mu A^\mu=0$ in classical electrodynamics.  I need an clear argument that   involves the equations of motion for just the potentials $A^0$ and $\mathbf{A}$, and not the electric and magnetic fields.   includes sources $\rho$ and $\mathbf{J}$ in the equations of motion.  This is to justify the assertion that there are degrees of freedom that decouple from the rest of system. does not critically rely on quantum field theoretic arguments (although any supplementary remarks are welcome).     To illustrate the level of clarity I expect, I provide an argument in the Coulomb gauge $\nabla\cdot \mathbf{A} = 0$:  Of the four field degrees of freedom, the gauge condition $\nabla\cdot \mathbf{A} = 0$ removes one degree of freedom (the longitudinally polarized EM waves).  To show that among the remaining three degrees of freedom only two are propagating, consider the field equations of motion in the Coulomb gauge:  \begin{align} \nabla^2 A^0 &= -\rho/\epsilon_0,\\ \big[\frac{1}{c^2}\frac{\partial^2}{\partial t^2}-\nabla^2\big]\mathbf{A}&= \mu_0 \mathbf{J}-\nabla \frac{1}{c^2}\frac{\partial}{\partial t}A^0. \end{align}  The first equation is NOT a wave equation for $A^0$, and thus does not propagate.  The final equation IS a wave equation, and describes the propagation of two degrees of freedom (Gauss' law in first eq. can be solved, and then inserted into the second equation to show that $\mathbf{A}$ only couples to the Solenoidal part of the current).


A person who is adamant because he knows he is right, without being rude

At my workplace, my senior, who is senior than me by age, experience and knowledge is always right. I want to tell (admit/appraise) him that, I do what he says and do not put my POV because at the end of conversation he will emerge as correct with all facts and examples and convince all of us in meeting. I don't want to use stubborn, adamant or any other rude word because he is never rude but polite. Edit: I want to add more maybe it is more  or less similar to what I wrote, still I think it would bring us more closer to that word.  He doesn't easily surrender to what anyone says in meeting and put facts across to in support of his point. Generally it becomes kind of interactive debate session and he appears to be winner in the end.  Steadfast:  He could come up as "Sorry, what did you say" and I go like "blah blah.." He again, "No dear, I am not that person" another debate started.  Authoritative, Self-reliant or Self-Righteous:  He could come up as "Oh no dear, I don't want to act as Authority, authoritative here, I am just putting facts on the table".  I am looking for word that people would accept, without any explanation/after-thoughts.


Download entire Ubuntu One folders from the web client?

Since U1's being axed and the desktop client can't connect, how should I about downloading large numbers of files in nested folders from the web client?  I'd prefer to not install Chrome.


I am trying to run an OpenGL program. When I compile that program terminal, it shows an error:  fatal error: GL/glut.h: No such file or directory  #include <GL/glut.h>   When I try to install freeglut, I got another error:  $ sudo apt-get install mesa-common-dev libgi-mesa-dev libglui-mesa-dev freeglut3-dev [sudo] password for yash:  Reading package lists... Done Building dependency tree        Reading state information... Done E: Unable to locate package libgi-mesa-dev E: Unable to locate package libglui-mesa-dev    Please help me to figure this out.


Find and replace multiple values within selected cells

I want to run a find and replace on multiple values within a range in excel with values from 2 columns: A with the original word; B with the translation. I already found the VBA code to get this working for 50%, but this code runs it on the whole worskheet.  Ideally I would like to be able to run it on just the range I selected. An added bonus would be if I could also select the lookup range.  This is what I'm using this far. Thanks for your help!  Sub abbrev()             Dim abvtab() As Variant             Dim ltsheet As Worksheet             Dim datasheet As Worksheet             Dim lt As Range              'Change Lookup to the sheet name with your lookup table.             Set ltsheet = Sheets("Lookup")              'Change Data to the sheet name with your data.             Set datasheet = Sheets("Data")              'Change A2 to the top left cell (not the header) in your lookup table.             'Change B2 to top right cell.             Set lt = ltsheet.Range("A1", ltsheet.Range("B1").End(xlDown))              abvtab = lt              For i = 1 To UBound(abvtab)                 datasheet.Cells.Replace What:=abvtab(i, 1), Replacement:=abvtab(i, 2), LookAt:=xlPart, _                     SearchOrder:=xlByRows, MatchCase:=True, SearchFormat:=False, _                     ReplaceFormat:=False             Next i End Sub


How can I scale an overlay within an ffmpeg filtercomplex?

I would like to apply a PNG  (watermark) to an arbitrary video file using ffmpeg. I would like the video to stay its original size (which I don't know ahead of time), and the PNG to be  relative to the video.  For example, the following command places the overlay in the top left:  ffmpeg.exe -i input.mov -i header.png -filter_complex \     "[0][1] overlay=0:0" output.mkv   And the following command scales the overlay relative to itself (1/5 of the width, height relative):  ffmpeg.exe -i input.mov -i header.png -filter_complex \     "[1] scale=iw/5:-1 [scaled]; \     [0][scaled] overlay=0:0" output.mkv   How could I make the overlay 1/5 of the width of input.mov? (For example, is it possible to store and/or query the width of another filter clause?)  The closest question I've come across is  but that answer uses external Linux/Cygwin commands.  was also helpful while I was figuring ffmpeg out. However, I'm on Windows and invoking ffmpeg via Python, so I'd like to do it all within the filter_complex clause. If that's not possible, I'd like to know for sure so I can stop trying :)


How can I implement an '&' inside a \left( \right) environment?

I've been running into a strange issue. I'm doing some derivations in  LaTeX document, and am using the align environment to do so. Some derivations require multi-line brackets, for which I try to use   \left( \right. \\ \left. \right)   However, when I want to align my equations with something inside these brackets, I run into errors. Example:   \begin{align} blablabla x=y \left(5 + 3 & + \right. \\ & \left. + 1 + 9 + 7 \right) \end{align}   This runs into trouble, while  \begin{align} blablabla & \left(5 + 3 + \right. \\ & \left. + 1 + 9 + 7 \right) \end{align}   works just fine. Hence, I strongly suspect that the problem is caused by the first ampersand being inside the \left( ... \right) environment. Is there any way to get this to work? Any help would be much appreciated.   EDIT: For clarity: I'm looking for a way around the ampersand problem: I would like to have the ampersand inside my \left( ... \right) environment. Is there any way to do this?


How can I extend the partition of Ubuntu when it's installed on the last partition?

As can be seen in the picture     My Ubuntu is installed on /dev/sda4, which is located after the unallocated space. I neither can resize /dev/sda4, /dev/sda5 nor /dev/sda6.  Is there any way to extend my Ubuntu?  Do I have to reinstall Ubuntu on a previous partition such as /dev/sda2?


I installed a new SSD in my PC laptop which came with an OEM version of Windows 8.  After trying unsuccesfully to get the OEM version of Windows onto the SSD drive I gave up and purchased and downloaded a NEW copy of Windows 8. After that I created an ISO image on my desktop machine and followed the instructions  to create a bootable USB flash drive.  However, after going through the boot install process with the USB flash drive on my laptop I get the following message 'The product key entered does not match any of the Windows images available for installation. Enter a different product key.' But I wasn't asked to enter any key!  Is this because the ISO image was created on a different machine? I really don't get why this should be so difficult.


Minecraft - Can't use the new naming system

I've had multiple problems with commands all involving the new naming system. It just won't work. Only the IDs will. For example, if I were to try     /scoreboard objectives add snow stat.mineBlock.snow Snow   That wouldn't work. But,     /scoreboard objectives add snow stat.mineBlock.80 Snow   would work. I have no idea why, and this has stressed me so much. This won't work in 1.7.10 or the latest snapshots. Does anybody know why this won't work? Please help.


Will doodling on my passport make it invalid?

I chanced on an  today, featuring a guy who likes to draw artwork into passports. The article claims that the passports still work without an issue.  Now I am pretty sure my passport says something like 'no manual annotations can be made without rendering it invalid', so I am a little sceptical about that article.  Has anyone experience on how drawing into one's passport effects its validity and how much that is enforced?


As you might know, I was going to reinstall windows. But on the step "Choose a Physical Location to Install Windows On" I faced this 100MB partition. What is it for? Should I delete it or leave it as it is? Should I choose this partition as a location to install windows on? Also, it appears to vary in size. Some information on what affects the size is appreciated.


Prove combinatorial Identity using a combinatorial argument.

I have proved by induction on k that : $$ \binom{n}{n} + \binom{n+1}{n} + \binom{n+2}{n}+ ... + \binom{n+k}{n} = \binom{n+k+1}{n+1} $$  But now, I need to prove it using a combinatorial argument. Could someone give me a hint ? :/  Thank you !


I have a model imported from SMD file, and all the faces of the mesh seem independent. When I move a single face, the faces around it do not warp (a hole appear in the mesh).  I wonder how I could make a unified mesh from all the independent faces ?   Thanks


How to recover tmp folder and problems with apt lockfile

I accidentally deleted tmp folder. than I was unable to visit browser neither could update/upgrade from terminal. I somehow managed to give 777 permissions to tmp. but When running sudo apt-get upgrade. producing following error.  Processing triggers for libc-bin (2.19-0ubuntu6.6) ... Processing triggers for libreoffice-common (1:4.2.8-0ubuntu3) ... E: Could not get lock /var/cache/apt/archives/lock - open (11: Resource temporarily unavailable) E: Unable to lock the download directory E: Problem executing scripts DPkg::Post-Invoke 'apt-get clean' E: Sub-process returned an error code


I am wondering if Predictive Equation and similar abilities count as Assets in the Cypher system. While some explicitly state that they grant an asset, Predictive Equation instead says that     The next time you interact with it (possibly in the following round), the difficulty of a related task (such as persuading the creature, attacking it, or defending from its attack) is reduced by one step.   Similarly, Destroy Metal states     the difficulty of this task is decreased by three steps (compared to breaking it with brute strength)   which would seem to contradict the following statement if it counted as an asset:     The important thing to remember is that a skill can reduce the difficulty by no more than two steps, and assets can reduce the difficulty by no more than two steps, regardless of the situation. Thus, no task’s difficulty will ever be reduced by more than four steps without using Effort.   In Numenera, these abilities would not count as Assets:     Some rare abilities allow the player to ease tasks and don't count as assets or training. Therefore, if an ability allows a character to ease a task, and does not state that it is an asset or training, it does not count towards the character's limits.   but I can find no such statement within the Cypher System Rulebook.  Where in the Cypher System Rulebook do the rules say if Predictive Equation and similar abilities count as Assets in the Cypher system?


What are the differences between dark energy and a cosmological constant?

My possibly mistaken understanding is that  changes with time, whereas a  is, well, constant.  What about gravitational clumping? Detecting relative motion?


Can you please cite a book that treats deep learning from the mathematical perspective as I tried to search, but most of the books are either technical or too superficial in terms of the mathematics behind?


Last year  by changing their shape. Does this violate the special theory of relativity?


Ubuntu Software Center, Update and pretty much everything else doesn't work :D

The Software Center closes instantly after I opened it. sudo apt-get update and all commands related to this don't work either.   E: Typ »!DOCTYPE« in line 1 of sources list /etc/apt/sources.list.d>/medibuntu.list is unknown. E: The sources list could not be read.   Sorry that its German but language selection doesn't work as well. It seems like the lists can't be opened :(


I need to travel from Spain to UK and return on my US passport. Is there a reason I cannot do this?  Thanks.


Let $\,A,B\,$ be two finite subgroups of a group $\,G.\,$ We define $\,AB=\left\{ab \mid a\in A,b\in B\right\}$. Prove that $\;\left\lvert AB\right\rvert=\dfrac{\left\lvert A\right\rvert\cdot\left\lvert B\right\rvert}{\left\lvert A\cap B\right\rvert}$. I want a complete proof plz.


How can I identify lead-free solder if it's unpackaged?

Is there a test to determine whether solder is leaded or lead-free? Perhaps conductivity/resistance?


Is there an intuitive reason why the natural logarithm shows up in the Prime Number Theorem?

I've always wondered if it has something to do with the idea that the probability that an integer is divisible by a prime $p$ is $1/p$.


Why are editors not suggested as targets of @ comments?

When replying to a user in a comment, their name is automatically suggested in a pop-up:    But that only works if they have already left a comment.  Sometimes I want to notify a user who has made a , but there no pop-up that suggests the name of these users:    Does the user still get a notification of the comment if you manually type in their username?  Edit I have changed this to a feature request, instead of posting a new question. Is this OK?


Installing ubutu 14.04 on Windows 64 - gettting Windows Disk Image Burner pop-up -file too big to put on CD

I downloaded the ubuntu-14.04.3-desktop-amd64.iso file to my Windows 7 disk drive and tried to open it. I then get a Windows Disk Image Burner pop-up.  When I try to proceed, it errors out saying the file is too big for a CD. How do I get past this?


Is there a biological basis for race (re: Nicholas Wade's article)

I just recently read this article by Nicholas Wade on Time Magazine's website about .  It all sounded very racist, but of course my Western liberal attitudes about racism shouldn't cloud my stronger Western liberal convictions about Science giving every empirical claim a fair hearing.    So, that said, where can I learn more about the evidence supporting and contradicting this view?  I found on his Wikipedia page that a number of scientists have condemned his work, but I'd like to actually know the evidence and arguments underneath all this.   I suppose I should also ask more generally about the state of biological evidence for the reality of race.  I had heard in college that there is no biological basis for race, but I'm wondering if that is an out-dated view in light of recent work in genomics.  I read  but it had more to do with whether there is a consensus rather than on the arguments surrounding the issue.


How is the skillset of an evolution being chosen?

You may already know that if you catch two Pidgeys, they may have a different skillset.  I've also seen that evolving them from different skillsets will also create Pidgeottos with different skillsets.  Are those skills chosen randomly or do they follow a specific pattern? (Like Pidgey pattern 1 will always evolve into Pidgeotto pattern 1.)  If they are specific, is there a website to check for them?


Proof of "Eigenvectors corresponding to different eigenvalues are linearly independent."

"Eigenvectors corresponding to different eigenvalues are linearly independent."  My professor told us this during a lecture, but gave no proof or explanation.


I uninstalled jdk packages and now can't install them back. I managed to install oracle-java7-installer and oracle-java8-installer but can't install oracle-java9-installer. It seems that my computer tries to download wrong version of oracle-java9-installer 177 when version i would be able to download is 178.    $ wget http://download.java.net/java/jdk9/archive/178/binaries/jdk-9+178_linux-x64_bin.tar.gz --2017-07-21 11:00:02--  http://download.java.net/java/jdk9/archive/178/binaries/jdk-9+178_linux-x64_bin.tar.gz Connecting to 10.144.1.10:8080... connected. Proxy request sent, awaiting response... 200 OK Length: 293348142 (280M) [application/x-gzip] Saving to: 'jdk-9+178_linux-x64_bin.tar.gz'  jdk-9+178_linux-x64_bin.tar.gz     1%[>                                                          ]   5.42M  5.04MB/s               ^C  $ wget http://download.java.net/java/jdk9/archive/177/binaries/jdk-9+177_linux-x64_bin.tar.gz --2017-07-21 11:00:16--  http://download.java.net/java/jdk9/archive/177/binaries/jdk-9+177_linux-x64_bin.tar.gz Connecting to 10.144.1.10:8080... connected. Proxy request sent, awaiting response... 404 Not Found 2017-07-21 11:00:17 ERROR 404: Not Found.   Can you help? apt-get tries to install Oracle JDK 9.  I run Ubuntu 16.04 in virtual machine hosted by win7  Full error message:  sudo apt-get install oracle-java9-installer Reading package lists... Done Building dependency tree        Reading state information... Done oracle-java9-installer is already the newest version (9b177-1~webupd8~0). 0 upgraded, 0 newly installed, 0 to remove and 147 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue? [Y/n] Y Setting up oracle-java9-installer (9b177-1~webupd8~0) ... Using wget settings from /var/cache/oracle-jdk9-installer/wgetrc Downloading Oracle Java 9... --2017-07-21 10:54:11--  http://download.java.net/java/jdk9/archive/177/binaries/jdk-9+177_linux-x64_bin.tar.gz Connecting to 10.144.1.10:8080... connected. Proxy request sent, awaiting response... 404 Not Found 2017-07-21 10:54:13 ERROR 404: Not Found.  download failed Oracle JDK 9 is NOT installed. dpkg: error processing package oracle-java9-installer (--configure):  subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing:  oracle-java9-installerE: Sub-process /usr/bin/dpkg returned an error code (1)


Is gravitational wave affected by gravitational field

Does gravitational wave show gravitational lensing?  Does it bend around mass?