7.67.1 Top new questions this week

7.67.1.1 Vertical spiral: from old fashioned to tikz

https://tex.stackexchange.com/landing/r/digest?cta=question&id=620283

I'm trying to draw in tikz the following figure taken from an old book: 
I tryed with standard spiral as suggested in How to draw vertical spiral using TiKZ? but the result is not satisfactory. Can you ... 
[tikz-pgf] [diagrams] [asymptote]
 

asked by Giuseppe Joseph Peppe Arnone https://tex.stackexchange.com/landing/r/digest?cta=user&id=255435 14 votes

answered by Juan CastaA~+-o https://tex.stackexchange.com/landing/r/digest?cta=user&id=231368 8 votes

7.67.1.2 Parse WolframAlpha's matrices into LaTeX

https://tex.stackexchange.com/landing/r/digest?cta=question&id=620338

I sort of have the same issue as this question, but the reverse. 
It is often the case that I need to write out a matrix in LaTeX, one resulting from a computation of some sort. Of course, the ... 
[macros] [matrices] [wolfram-mathematica]
 

asked by Eevee Trainer https://tex.stackexchange.com/landing/r/digest?cta=user&id=176173 11 votes

answered by Steven B. Segletes https://tex.stackexchange.com/landing/r/digest?cta=user&id=25858 10 votes

7.67.1.3 Writing exercices in a certain fashion

https://tex.stackexchange.com/landing/r/digest?cta=question&id=620059

I am trying to write to code that makes exercices look like the picture below. Herea^\200\231s my code. The stars give information about the exercice difficulty level which are graded 1,2 or 3. The first is ... 
[tikz-pgf] [tcolorbox]
 

asked by DINEDINE https://tex.stackexchange.com/landing/r/digest?cta=user&id=185967 9 votes

answered by leandriis https://tex.stackexchange.com/landing/r/digest?cta=user&id=134144 14 votes

7.67.1.4 When to use \nolimits when defining a math operator?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=620454

In plain TeX, \cos is defined as \mathop {\rm cos}\nolimits but \gcd as \mathop {\rm gcd}. 
In what case to use \nolimits when defining a math operator to be typeset in roman? 
[math-operators] [plain-tex]
 

asked by Laravel https://tex.stackexchange.com/landing/r/digest?cta=user&id=227615 7 votes

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 3 votes

7.67.1.5 siunitx (v3.0.33) with font matching and unit qualifier in text mode

https://tex.stackexchange.com/landing/r/digest?cta=question&id=620271

Trying to get the following to work: 
\documentclass{scrbook} 
\usepackage[x11names]{xcolor} 
\usepackage{unicode-math} 
\setmainfont[% 
Numbers=Lowercase,% Hanging/OldStyle numbers through ... 
[math-mode] [fonts] [fontspec] [siunitx] [unicode-math]
 

asked by Alex Povel https://tex.stackexchange.com/landing/r/digest?cta=user&id=120853 7 votes

answered by Joseph Wright https://tex.stackexchange.com/landing/r/digest?cta=user&id=73 3 votes

7.67.1.6 `! Bad character code (-1)` when using monospace, Spanish, and the word starts with "r"

https://tex.stackexchange.com/landing/r/digest?cta=question&id=620167

I'm facing a weird problem when trying to compile a PDF that contains a quoted word that starts with "r" while using the babel package in Spanish and monospace fonts. 
This minimal example 
\... 
[babel] [compilation-error]
 

asked by Elio Campitelli https://tex.stackexchange.com/landing/r/digest?cta=user&id=154455 7 votes

answered by Davislor https://tex.stackexchange.com/landing/r/digest?cta=user&id=61644 8 votes

7.67.1.7 Increase header/footer margin with scrlayer-scrpage

https://tex.stackexchange.com/landing/r/digest?cta=question&id=620427

I want to edit header/footer of my document with the scrlayer-scrpage package. Here's the MWE: 
\documentclass[english,BCOR=6mm,cdgeometry=twoside,DIV=12,open=right,headsepline]{tudscrbook} 
\usepackage{... 
[header-footer] [koma-script] [scrbook]
 

asked by modeltheory https://tex.stackexchange.com/landing/r/digest?cta=user&id=255528 5 votes

answered by esdd https://tex.stackexchange.com/landing/r/digest?cta=user&id=43317 0 votes