6.59.1 Top new questions this week

6.59.1.1 How to draw a diagram for "Rope Around the Earth" problem?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=567458

I would like to produce an image to help students to better understand the celebrated ``Rope Around the Earth'' problem, which asks---how much slack must be added to a tightly fitting rope around the ... 
[tikz-pgf] [diagrams] [draw] [tikz-graphs]
 

asked by mlchristians https://tex.stackexchange.com/landing/r/digest?cta=user&id=192836 9 votes

answered by Alenanno https://tex.stackexchange.com/landing/r/digest?cta=user&id=4778 12 votes

6.59.1.2 Wrapping the document environment into another environment fails since LaTeX Update of October 2020

https://tex.stackexchange.com/landing/r/digest?cta=question&id=566812

Since the last LaTeX Update, wrapping \document into another environment fails, possibly because of the new hook management system. 
The following used to work: 
\documentclass{article} 
\newenvironment{... 
[errors] [environments] [updating] [lthooks]
 

asked by Thomas F. Sturm https://tex.stackexchange.com/landing/r/digest?cta=user&id=30617 7 votes

answered by Phelype Oleinik https://tex.stackexchange.com/landing/r/digest?cta=user&id=134574 8 votes

6.59.1.3 Horizontal curly braces inside matrix determinant

https://tex.stackexchange.com/landing/r/digest?cta=question&id=567350

I'm trying to make this determinant: 
But I don't know how to put the curly braces. I've tried with \underbrace but I get the brace only under a_m, not the entire space. 
My try: 
\documentclass{... 
[symbols] [matrices] [braces]
                                                                                  

                                                                                  
 

asked by Iborra https://tex.stackexchange.com/landing/r/digest?cta=user&id=222098 6 votes

answered by Sebastiano https://tex.stackexchange.com/landing/r/digest?cta=user&id=117876 5 votes

6.59.1.4 Problems with A~\205 A~\230 A~\206 in equations

https://tex.stackexchange.com/landing/r/digest?cta=question&id=567032

I am from Denmark, and I am using a lot of A~\205 A~\206 A~\230 in my equations. It gives me a lot of errors, which i would like to get rid of. Is there an easy way to do it? 
Also, I am using ; to make space in ... 
[math-mode] [scandinavian-letters]
 

asked by Morten Mandsberg https://tex.stackexchange.com/landing/r/digest?cta=user&id=207585 6 votes

answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 15 votes

6.59.1.5 String of hexadecimal numbers don't align properly in tabular cell

https://tex.stackexchange.com/landing/r/digest?cta=question&id=567102

The code below 
\begin{tabular}{|c|c|c| } 
\hline 
$C_2$ & B5 6E 2C D4 F3 12 57 3E 8C 8C 1A 77 A3 EE C3 41 \\ 
$P'_3 \xor P_3$ & 00 00 00 00 00 0F 00 03 00 00 00 00 00 00 00 ... 
[tables] [fonts] [spacing] [cell]
 

asked by Valeriy Dutt https://tex.stackexchange.com/landing/r/digest?cta=user&id=226912 6 votes

answered by John Kormylo https://tex.stackexchange.com/landing/r/digest?cta=user&id=34505 5 votes

6.59.1.6 Why are my matrix columns not aligned properly? (Left or right whitespace)

https://tex.stackexchange.com/landing/r/digest?cta=question&id=566738

If I put the & on the right I get whitespace on the right.  If I put the & on the left I get whitespace on the left.  I can't find anything about this problem.  I just want my matrices to look ... 
[matrices]
 

asked by Nate https://tex.stackexchange.com/landing/r/digest?cta=user&id=226686 6 votes

answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 5 votes

6.59.1.7 \renewenvironment and environment hooks

https://tex.stackexchange.com/landing/r/digest?cta=question&id=566719

This question refers to the hook system of LaTeX 2e introduced in October 2020 (lthooks). 
How does \renewenvironment interact with its hooks? 
Are the hooks cleared or does the code already added to ... 
[latex-base] [hooks] [lthooks]
 

asked by gernot https://tex.stackexchange.com/landing/r/digest?cta=user&id=110998 6 votes

answered by Phelype Oleinik https://tex.stackexchange.com/landing/r/digest?cta=user&id=134574 6 votes