11.31.1 Top new questions this week

11.31.1.1 How can I write something like `$ -x $` without excessive spacing?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=741956

I want to write the absolute value of "negative x". When writing $|-x|$, I seem to get excessive spacing: 
Note how there is a lot of space between the vertical bars and the minus sign. 
How ... 
[math-mode] [symbols]
 

asked by Robin https://tex.stackexchange.com/landing/r/digest?cta=user&id=220881 Score of 15

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 27

11.31.1.2 Single $ sign fixes an error in NewDocumentCommand

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742265

For some reason, this macro creates no error 
\documentclass{article} 
\usepackage{xparse} 
\usepackage{amsmath} 
\NewDocumentCommand{\ex}{e{!}m}{ 
\exists\IfValueTF{#1}{!#1$}{#2} 
} 
\begin{document} 
$\... 
[macros] [xparse]
 

asked by Nolord https://tex.stackexchange.com/landing/r/digest?cta=user&id=278044 Score of 9

answered by cfr https://tex.stackexchange.com/landing/r/digest?cta=user&id=39222 Score of 8

11.31.1.3 Adding comparators to siunitx

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742084

I'm trying to use \lessapprox (a^\252\205) within the SI package. It is not a default comparator, but there is the package option input-comparators described in the manuals. But I don't know how to use it. I ... 
[siunitx]
                                                                                  

                                                                                  
 

asked by deder https://tex.stackexchange.com/landing/r/digest?cta=user&id=392866 Score of 8

answered by jlab https://tex.stackexchange.com/landing/r/digest?cta=user&id=316068 Score of 8

11.31.1.4 How to prevent \chapter* a^\200\246  from appearing twice in EPUB table of contents?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742149

Using TeX4ebook, try compiling the following file (tex4ebook -f epub test.tex) 
\documentclass{book} 
\begin{document} 
\tableofcontents 
\chapter*{Introduction} 
\addcontentsline{toc}{chapter}{... 
[table-of-contents] [tex4ht] [tex4ebook] [ebook] [epub]
 

asked by obskyr https://tex.stackexchange.com/landing/r/digest?cta=user&id=392788 Score of 7

answered by michal.h21 https://tex.stackexchange.com/landing/r/digest?cta=user&id=2891 Score of 4

11.31.1.5 FiraMono and numbers

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742171

I am currently trying to use the FiraMono Font in my LaTeX project. However, the numbers are... not aligned and simply look bad or out of scale. 
Take this minimal example: 
\documentclass{article} 
\... 
[fonts] [typewriter]
 

asked by Kurt https://tex.stackexchange.com/landing/r/digest?cta=user&id=301039 Score of 7

answered by Jasper Habicht https://tex.stackexchange.com/landing/r/digest?cta=user&id=47927 Score of 10

11.31.1.6 Getting suit symbols with pdflatex and luatex

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742089

I have these questions: 
Running pdflatex I get black Clubs/Spades and white Diamonds/Hearts. Though I 
can live with that in my application, I wonder if it is possible to get them 
at wish black or ... 
[pdftex] [luatex] [unicode]
 

asked by Jack https://tex.stackexchange.com/landing/r/digest?cta=user&id=33338 Score of 7

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 2

11.31.1.7 Table with tabularx and multicolumn, unable to get correct cell widths

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742093

I'm trying to create a table which spans the entire page and where each row can have either one, two or three cells (each cell should have equal width.) I tried to use tabuarx with column type X and ... 
[tables] [tabularx] [multicolumn]
 

asked by mlidal https://tex.stackexchange.com/landing/r/digest?cta=user&id=392880 Score of 7

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