7.77.1 Top new questions this week

7.77.1.1 Chat bubbles with picture and name attached

https://tex.stackexchange.com/landing/r/digest?cta=question&id=624775

I'd like to modify the code from (the improved version of the top voted answer of) this post to make the sequence of speech bubbles look more like a chat window. Specifically, I'd like to include a ... 
[typography] [text-decorations]
 

asked by Willow https://tex.stackexchange.com/landing/r/digest?cta=user&id=235358 15 votes

answered by CarLaTeX https://tex.stackexchange.com/landing/r/digest?cta=user&id=101651 12 votes

7.77.1.2 Use recursion in LaTeX3

https://tex.stackexchange.com/landing/r/digest?cta=question&id=625320

I want to use recursion to calculate n! in LaTeX3, but found that the result is not correct, mwe is as follows 
\documentclass{article} 
\ExplSyntaxOn 
\cs_set:Nn \froac:n { 
\... 
[expl3]
 

asked by lijun guo https://tex.stackexchange.com/landing/r/digest?cta=user&id=256849 14 votes

answered by Marcel KrA~\274ger https://tex.stackexchange.com/landing/r/digest?cta=user&id=80496 19 votes

7.77.1.3 Planes tangent to a cylinder

https://tex.stackexchange.com/landing/r/digest?cta=question&id=624822

I am trying to make this graph 
I have had several advances compared to my original question, but I don't know how to color the part blue, 
This is the result that I have obtained together with the ... 
[tikz-pgf] [asymptote] [tikz-3d] [pst-solides3d]
 

asked by Zaragosa https://tex.stackexchange.com/landing/r/digest?cta=user&id=248335 10 votes

answered by Juan CastaA~+-o https://tex.stackexchange.com/landing/r/digest?cta=user&id=231368 9 votes

7.77.1.4 Off Diagonal matrix

https://tex.stackexchange.com/landing/r/digest?cta=question&id=625331

How to write off diagonal matrix in latex? 
I tried this 
\begin{align*} 
\left[ 
\begin{array}{ccccc} 
&  &  &  & 1 \\ 
&  &  & \ldots  \\ 
1 &... 
[math-mode] [formatting] [matrices]
 

asked by aamir farooq https://tex.stackexchange.com/landing/r/digest?cta=user&id=258239 8 votes

answered by Vincent https://tex.stackexchange.com/landing/r/digest?cta=user&id=201628 10 votes

7.77.1.5 \maketitle has stopped working, despite backing up data

https://tex.stackexchange.com/landing/r/digest?cta=question&id=625166

Out of the blue I have started receiving the following errors (despite loading up previous versions of my files and/or bib. files from the cloud): 
Runaway argument? 
{\scantokens { \Huge {\bfseries {\@... 
[titles]
 

asked by Will Vickery https://tex.stackexchange.com/landing/r/digest?cta=user&id=258137 6 votes

answered by Robert https://tex.stackexchange.com/landing/r/digest?cta=user&id=7674 5 votes

7.77.1.6 Energy diagram for an exothermic reaction in TikZ

https://tex.stackexchange.com/landing/r/digest?cta=question&id=625244

I would like to draw an energy diagram with a maximum point. I started with this code: 
\documentclass[openany,twoside]{book} 
\usepackage{tikz} 
\begin{document} 
\begin{tikzpicture}[>=latex] 
\draw[&... 
[tikz-pgf] [diagrams]
                                                                                  

                                                                                  
 

asked by Kidegalize https://tex.stackexchange.com/landing/r/digest?cta=user&id=244658 6 votes

answered by Jasper Habicht https://tex.stackexchange.com/landing/r/digest?cta=user&id=47927 5 votes

7.77.1.7 Latex overlapping horizontal curly braces

https://tex.stackexchange.com/landing/r/digest?cta=question&id=625068

I followed this answer to create this: 
But I end up with this: 
Code: 
\documentclass{article} 
\begin{document} 
\[ 
\lefteqn{\underbrace{\phantom{S \rightarrow A}}_{n_0}} S \rightarrow 
\lefteqn{\... 
[math-mode] [underbrace] [overbrace]
 

asked by Node.JS https://tex.stackexchange.com/landing/r/digest?cta=user&id=122628 6 votes

answered by Jasper Habicht https://tex.stackexchange.com/landing/r/digest?cta=user&id=47927 10 votes