5.31.1 Top new questions this week

5.31.1.1 How to plot two curves with the same area under?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=507348

I doubt this is doable in tikz/pgfplots but maybe some expert could give me an idea. 
I would like the area under the second graph to be the same as the one under the first graph (they are probability  ... 
[tikz-pgf] [pgfplots]
 

asked by CarLaTeX https://tex.stackexchange.com/landing/r/digest?cta=user&id=101651 11 votes

answered by SchrA~\[Paragraph]dinger's cat https://tex.stackexchange.com/landing/r/digest?cta=user&id=194703 9 votes

5.31.1.2 Are there any non-WEB re-implementation of TeX Core in recent years?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=507846

I am looking for re-implementations, in recent years, of the TeX core algorithm (which Knuth wrote in ca. 1982). 
It would seem to me that LaTeX, XeTeX, LuaTeX all call the TeX core, which is written  ... 
[tex-core] [tex-history]
 

asked by Violapterin https://tex.stackexchange.com/landing/r/digest?cta=user&id=119648 10 votes

answered by ShreevatsaR https://tex.stackexchange.com/landing/r/digest?cta=user&id=48 16 votes

5.31.1.3 What is the difference between \tl_to_str:V and \tl_to_str:N? Examples?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=507422

According to the interface3 documentation \tl_to_str:N expects a 'tl var', which I believe might be e.g. \g_temp_tl. 
\tl_to_str:V should, if I got it right, expect an argument representing a control  ... 
[expl3] [latex3] [token-lists]
                                                                                  

                                                                                  
 

asked by Robert Siemer https://tex.stackexchange.com/landing/r/digest?cta=user&id=15894 8 votes

answered by schtandard https://tex.stackexchange.com/landing/r/digest?cta=user&id=48973 8 votes

5.31.1.4 Writing a worded mathematical expression

https://tex.stackexchange.com/landing/r/digest?cta=question&id=507709

How to write the below expression in latex using equation or align. 
Edit: Changed the wordings based on the suggestion from @Henri Menke 
[math-mode]
 

asked by Gowrishankar Hallilingaiah https://tex.stackexchange.com/landing/r/digest?cta=user&id=139659 8 votes

answered by Bernard https://tex.stackexchange.com/landing/r/digest?cta=user&id=38908 7 votes

5.31.1.5 Matrices upper triangular alignment

https://tex.stackexchange.com/landing/r/digest?cta=question&id=507659

I was writing an upper triangular matrix but due to large entry was unable to get in a good view. 
\documentclass[10pt,a4paper]{article} 
\usepackage[utf8]{inputenc} 
\usepackage{amsmath,mathtools} 
... 
[matrices] [typography]
 

asked by XYZABC https://tex.stackexchange.com/landing/r/digest?cta=user&id=183565 8 votes

answered by SchrA~\[Paragraph]dinger's cat https://tex.stackexchange.com/landing/r/digest?cta=user&id=194703 3 votes

5.31.1.6 How to make a pipe-divided tuple?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=507195

I'm trying to write a macro, \tup that will effectively expand this: 
\tup{a | b | ... | z} 
to this: 
\left\langle a ~\middle|~ b ~\middle|~ ... ~\middle|~ z \right\rangle 
I tried the following,  ... 
[math-mode] [macros]
 

asked by Alex Reinking https://tex.stackexchange.com/landing/r/digest?cta=user&id=42504 8 votes

answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 13 votes

5.31.1.7 Closer slanted parallel symbol

https://tex.stackexchange.com/landing/r/digest?cta=question&id=507947

Looking the @egreg's answer where I have deleted some parts of code 
\documentclass[12pt]{article} 
\newcommand{\parallelsum}{\mathbin{\!/\mkern-5mu/\!}} 
\begin{document} 
$AB \parallelsum CD$ 
... 
[math-mode] [pdftex] [symbols]
 

asked by Sebastiano https://tex.stackexchange.com/landing/r/digest?cta=user&id=117876 6 votes

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 7 votes