6.45.1 Top new questions this week

6.45.1.1 Where I can find introduction to programming in expl3?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=558814

Is there an introduction to programming in expl3? 
I sawhttp://ctan.math.washington.edu/tex-archive/macros/latex/contrib/l3kernel/expl3.pdf 
but it doesn't discuss control structures (For example does  ... 
[expl3] [latex3]
 

asked by Adam https://tex.stackexchange.com/landing/r/digest?cta=user&id=39739 9 votes

answered by Henri Menke https://tex.stackexchange.com/landing/r/digest?cta=user&id=10995 10 votes

6.45.1.2 How do I create layers when drawing a symbol for a node?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=558848

How do I draw the same picture as a node in figure 1 as with just tikz (to the left)? 
This is what I'm trying to do: 
\documentclass{article} 
\usepackage{float} 
\usepackage{tikz} 
\tikzset{ remember  ... 
[tikz-pgf] [tikz-styles]
 

asked by asasasasas https://tex.stackexchange.com/landing/r/digest?cta=user&id=218821 8 votes

answered by AndrA~(c)C https://tex.stackexchange.com/landing/r/digest?cta=user&id=138900 9 votes

6.45.1.3 What is the difference between \\* and \\ *?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=558610

I used a * in a bsmallmatrix and found a curious effect. If I write \\* the * is not printed whereas with \\ * it is. Do you guys know why this happens? 
My tiny example and screenshot follow below: 
... 
[math-mode] [matrices] [mathtools] [syntax] [semantics]
 

asked by nopx https://tex.stackexchange.com/landing/r/digest?cta=user&id=219632 8 votes

answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 12 votes

6.45.1.4 The difference between  \x >\y  and  \x >? \y  in xfp package?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=558606

On page 1/2 of xfp package we see x >? y as a valid comparison operator. Is it different from x>y? 
I think they are equivalent based on my following code, but not sure: 
\documentclass{article} 
... 
[xfp]
 

asked by Aria https://tex.stackexchange.com/landing/r/digest?cta=user&id=187781 7 votes

answered by Henri Menke https://tex.stackexchange.com/landing/r/digest?cta=user&id=10995 7 votes

6.45.1.5 How can I animate a TikZ drawing in beamer?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=558850

Regretfully I didn't find a detailed tutorial about how to animate tikz images, I tried to understand the answer's code of this question but no success. So I just want to rotate the following blue  ... 
[tikz-pgf] [beamer] [animate]
 

asked by Hibou https://tex.stackexchange.com/landing/r/digest?cta=user&id=200228 6 votes

answered by A~\221ako https://tex.stackexchange.com/landing/r/digest?cta=user&id=89320 18 votes

6.45.1.6 How to make underbracket thinner

https://tex.stackexchange.com/landing/r/digest?cta=question&id=559078

Consider this code, 
\documentclass{article} 
\usepackage{mathtools} 
\begin{document} 
\[ 
... 
[mathtools]
 

asked by Sukan https://tex.stackexchange.com/landing/r/digest?cta=user&id=99755 6 votes

answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 7 votes

6.45.1.7 Tikz matrix library: Corner to corner arrows between cells may come in reverse order

https://tex.stackexchange.com/landing/r/digest?cta=question&id=558519

When the matrix library is loaded and the matrix of nodes key is activated, each node can be accessed according to the name-row-column syntax. 
In some cases, the arrows are built in the opposite  ... 
[tikz-pgf] [tikz-matrix]
 

asked by AndrA~(c)C https://tex.stackexchange.com/landing/r/digest?cta=user&id=138900 6 votes

answered by F. Pantigny https://tex.stackexchange.com/landing/r/digest?cta=user&id=163000 5 votes