9.38.1 Top new questions this week

9.38.1.1 How does TeX know whether to eat this space if its catcode is about to change?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=687592

In the document 
\catcode32=13\def {o} \bye 
how does TeX know to tokenise the space after \def as an active character? 
Details: The correct result is o. First, we set spaces (ASCII 32) to be active ... 
[tex-core]
 

asked by Marnanel Thurman https://tex.stackexchange.com/landing/r/digest?cta=user&id=259978 Score of 13

answered by wipet https://tex.stackexchange.com/landing/r/digest?cta=user&id=51799 Score of 7

9.38.1.2 Double Widehat X

https://tex.stackexchange.com/landing/r/digest?cta=question&id=687920

How can I center double widehats on X? It works well on Y, but the second widehat on the X has a different center. 
Code: 
\documentclass{article} 
\usepackage{amsmath} 
\begin{document} 
$\widehat{\... 
[math-mode]
 

asked by DSM https://tex.stackexchange.com/landing/r/digest?cta=user&id=145881 Score of 8

answered by user691586 https://tex.stackexchange.com/landing/r/digest?cta=user&id=293669 Score of 6

9.38.1.3 I want to draw a 3-hyperlink (hyperedge with four nodes) as shown below? I have also included the code for my attempt at that

https://tex.stackexchange.com/landing/r/digest?cta=question&id=687673

\documentclass[crop, tikz]{standalone} 
\usepackage{tikz} 
\usetikzlibrary{topaths,calc, backgrounds} 
\begin{document} 
\begin{tikzpicture} 
% Define the nodes and their positions 
\node[draw,... 
[tikz-pgf] [graphs]
 

asked by tonygrey https://tex.stackexchange.com/landing/r/digest?cta=user&id=291025 Score of 8

answered by Sandy G https://tex.stackexchange.com/landing/r/digest?cta=user&id=125871 Score of 10

9.38.1.4 13 figures OK, 14 figures gives ! LaTeX Error: Counter too large. only with tex4ht and subfigure

https://tex.stackexchange.com/landing/r/digest?cta=question&id=687960

I changed to using subfigure inside figure. Now when I include more than 13 figures in one document, tex4ht gives 
! LaTeX Error: Counter too large. 
Same document compiles OK with lualatex. I made MWE ... 
[graphics] [subcaption] [tex4ht]
 

asked by Nasser https://tex.stackexchange.com/landing/r/digest?cta=user&id=14594 Score of 7

answered by michal.h21 https://tex.stackexchange.com/landing/r/digest?cta=user&id=2891 Score of 7

9.38.1.5 Redefined `epsilon` to `varepsilon`

https://tex.stackexchange.com/landing/r/digest?cta=question&id=687819

MWE: 
% !TeX program = xelatex 
\documentclass{article} 
\usepackage{libertinus} 
\renewcommand{\epsilon}{\varepsilon} 
\begin{document} 
This is \texttt{varepsilon}: $\varepsilon$. 
This ... 
[math-mode] [xetex] [unicode-math] [renewcommand] [libertinus]
 

asked by Evan Tseng https://tex.stackexchange.com/landing/r/digest?cta=user&id=278267 Score of 7

answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 Score of 6

9.38.1.6 Old style union and intersection symbols

https://tex.stackexchange.com/landing/r/digest?cta=question&id=687725

I find books typeset before 1970 sometimes more comfortable to read than more modern versions. I am trying to get this older book style for some of my LaTeX documents. Thanks to TeX Exchange I get ... 
[math-fonts]
 

asked by Philippe Cara https://tex.stackexchange.com/landing/r/digest?cta=user&id=298399 Score of 7

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 10

9.38.1.7 angle in a plane with tikz

https://tex.stackexchange.com/landing/r/digest?cta=question&id=687937

Here is a MWE: 
\documentclass[10pt,a4paper]{article} 
\usepackage{tikz} 
\usetikzlibrary{angles} 
\begin{document} 
\begin{tikzpicture} 
\coordinate (ey) at (1,0,0); 
\coordinate (ez) at (0,1,0); 
\... 
[tikz-pgf]
 

asked by Didier https://tex.stackexchange.com/landing/r/digest?cta=user&id=249670 Score of 5

answered by Juan CastaA~+-o https://tex.stackexchange.com/landing/r/digest?cta=user&id=231368 Score of 6