9.53.1 Top new questions this week

9.53.1.1 How to make a loop to draw a sequence semicircles?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=692956

I tried to draw a sequence of semicirles. This is my code. 
\documentclass[tikz,border=5mm]{standalone} 
\usetikzlibrary{calc} 
\usepackage{tkz-euclide} 
\begin{document} 
\begin{tikzpicture} 
\... 
[tikz-pgf] [tkz-euclide]
 

asked by Laurenso https://tex.stackexchange.com/landing/r/digest?cta=user&id=271550 Score of 10

answered by Qrrbrbirlbel https://tex.stackexchange.com/landing/r/digest?cta=user&id=16595 Score of 7

9.53.1.2 Why can the name of a `MathOperator` have a number?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=692785

This does not compile, which is what I'd expect: 
\documentclass{amsart} 
\newcommand{\G2}{G_2} 
%\DeclareMathOperator{\G2}{G_2} 
\begin{document} 
\(\G2\) 
\end{document} 
produces 
! LaTeX Error: Missing \... 
[macros] [math-operators] [catcodes]
 

asked by LSpice https://tex.stackexchange.com/landing/r/digest?cta=user&id=1169 Score of 9

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 12

9.53.1.3 All Caps with Commands

https://tex.stackexchange.com/landing/r/digest?cta=question&id=692949

I am trying to set some text in all caps (not small caps) using the \uppercase command. Part of the text is variable and stored in a separate command, but that portion of the text is being set in ... 
[capitalization]
 

asked by bbernicker https://tex.stackexchange.com/landing/r/digest?cta=user&id=250103 Score of 7

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 8

9.53.1.4 Code Review: LaTeX Profiling in expl3

https://tex.stackexchange.com/landing/r/digest?cta=question&id=693093

I have a pretty big template of packages/classes for multiple different document types. 
Some of the users sometimes complain that the compile times are soooo long. 
However, to find the bottlenecks of ... 
[expl3] [code-review] [profiling]
 

asked by Wulle https://tex.stackexchange.com/landing/r/digest?cta=user&id=152573 Score of 6

9.53.1.5 Grouping multiple matches with \str_case:nnF

https://tex.stackexchange.com/landing/r/digest?cta=question&id=693023

Consider the following: 
\documentclass{article} 
\usepackage{xparse} 
\ExplSyntaxOn 
\NewDocumentCommand{\demo}{m}{ 
\str_case:nnF{#1} 
{ 
{a} {Run case 1\\ % Actually super long code 
} 
{b} {... 
[xparse]
 

asked by ClA~(c)ment https://tex.stackexchange.com/landing/r/digest?cta=user&id=34551 Score of 5

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 6

9.53.1.6 Trouble with nested macros containing ifnum

https://tex.stackexchange.com/landing/r/digest?cta=question&id=692993

I have problems with macros containing ifnum. After using the command \noexpand one macro works fine, nesting two of them does not compile but causes the error message 
Extra \fi. \fi 
as in the ... 
[macros] [expansion] [nesting]
 

asked by gschaaf https://tex.stackexchange.com/landing/r/digest?cta=user&id=146219 Score of 5

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 6

9.53.1.7 How can I color just the outside \left and \right brackets?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=693133

\documentclass{article} 
\usepackage{amsmath} 
\usepackage{xcolor} 
\begin{document} 
\[ 
\left( 
\frac{-b \pm \sqrt{b^2 - 4ac}}{\textcolor{red}{2a}} 
\right) 
\] 
\end{document} 
Above I have a simple ... 
[math-mode] [color] [brackets]
 

asked by K Split X https://tex.stackexchange.com/landing/r/digest?cta=user&id=120834 Score of 4

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