6.55.1 Top new questions this week

6.55.1.1 LaTeX doesn't execute the \ref and \label commands

https://tex.stackexchange.com/landing/r/digest?cta=question&id=564569

code: 
\documentclass[a4paper,12pt]{article} % Eth\264Eth\276Eth+-EthDegreeEth\262Eth,N~\202N~\214 leqno Eth\262 [] Eth\264Eth>>N~\217 Eth\275N~\203Eth\274Eth\[Micro]N~\200EthDegreeN~\206Eth,Eth, N~\201Eth>>Eth\[Micro]Eth\262EthDegree 
%%% Eth EthDegreeEth+-Eth\276N~\202EthDegree N~\201 N~\200N~\203N~\201N~\201Eth\272Eth,Eth\274 N~\217Eth\[CenterDot]N~\213Eth\272Eth\276Eth\274 
\usepackage{cmap}                   % Eth\[DownQuestion]Eth\276Eth,N~\201Eth\272 Eth\262 PDF 
\usepackage{mathtext}               ... 
[cross-referencing]
 

asked by Eth\232Eth\276Eth\275N~\201N~\202EthDegreeEth\275N~\202Eth,Eth\275 Eth\226N~\203N~\207Eth\272Eth\276Eth\262 https://tex.stackexchange.com/landing/r/digest?cta=user&id=225611 10 votes

answered by Vincent https://tex.stackexchange.com/landing/r/digest?cta=user&id=201628 18 votes

6.55.1.2 What is the fifth possible value of \protect?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=564083

Section "11.4 Robust Commands and \protect" of source2e.pdf (File d: ltdefns.dtx Date: 2020/02/27 Version v1.5g) says that \protect can have one of five possible "values" but lists ... 
[latex-base] [protected-macro]
 

asked by Jewdokija https://tex.stackexchange.com/landing/r/digest?cta=user&id=225355 9 votes

answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 7 votes

6.55.1.3 A small display of a scientific calculator

https://tex.stackexchange.com/landing/r/digest?cta=question&id=564081

Starting from LCD package (one page) of documentation, looking in particular this question where there is the long code of @Thomas F. Sturm (here):, 
\documentclass[openany,10pt]{book} 
\usepackage{... 
[fonts] [color] [packages] [tcolorbox]
 

asked by Sebastiano https://tex.stackexchange.com/landing/r/digest?cta=user&id=117876 6 votes

answered by Alan Xiang https://tex.stackexchange.com/landing/r/digest?cta=user&id=219915 10 votes

6.55.1.4 Add optional argument to newcommand for integration dx

https://tex.stackexchange.com/landing/r/digest?cta=question&id=564583

In my preamble I use 
\newcommand\dx{\,dx}so that I can change formatting of all instances if it is needed.  What I would really like is to add an optional argument so that I can type \dx whenever I ... 
[optional-arguments] [integral]
 

asked by Andrea https://tex.stackexchange.com/landing/r/digest?cta=user&id=225613 6 votes

answered by Steven B. Segletes https://tex.stackexchange.com/landing/r/digest?cta=user&id=25858 8 votes

6.55.1.5 When are \space tokens discarded?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=564122

Consider this example: 
\obeyspaces 
b 
\bye 
The output is b. 
Why is the \space discarded? 
It is not discarded during pre-processing because it has catcode 13 - it is discarded during tokenization, ... 
[tex-core] [white-space]
 

asked by Igor Liferenko https://tex.stackexchange.com/landing/r/digest?cta=user&id=70900 6 votes

answered by Steven B. Segletes https://tex.stackexchange.com/landing/r/digest?cta=user&id=25858 3 votes

6.55.1.6 Adding footnote to the table leads to the error: ! Extra  , or forgotten \endgroup

https://tex.stackexchange.com/landing/r/digest?cta=question&id=564496

By making tables I am using packages siunitx, nicematrix and makecell. These three packages applied simultaneously seems to be sufficient for solving my problems with tables - like this one. I am ... 
[tables] [footnotes] [siunitx] [tablenotes] [nicematrix]
 

asked by forrest https://tex.stackexchange.com/landing/r/digest?cta=user&id=72572 5 votes

answered by F. Pantigny https://tex.stackexchange.com/landing/r/digest?cta=user&id=163000 2 votes

6.55.1.7 command diffp: index on a variable for partial derivative bug?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=564525

Consider the following, with the package: 
\usepackage[thinc]{esdiff} 
$\diffp*{A}{k}{Q_L}>0$ 
The code compiles. 
However with: 
$\diffp*{A}{Q_L}{k}>0$ 
It returns me "A left brace was ... 
[math-mode] [packages]
 

asked by StarBucK https://tex.stackexchange.com/landing/r/digest?cta=user&id=112153 5 votes

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 4 votes