8.53.1 Top new questions this week

8.53.1.1 How to detect if a Unicode character has been defined?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=654839

Using inputenc in pdfLaTeX, one can define macros for Unicode characters like this: 
\DeclareUnicodeCharacter{03BC}{\textmu} 
Is there a way to detect if I^\274 has been defined? (and if so what it is ... 
[pdftex] [unicode] [expl3] [input-encodings]
 

asked by WBob https://tex.stackexchange.com/landing/r/digest?cta=user&id=278687 Score of 7

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 7

8.53.1.2 Writing an s-expression with indented lines?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=654619

I'm writing some notes on parsing expressions, and one thing I want to illustrate is prefix notation equations. With this in mind, I want to be able to indent certain pieces of an s-expression. For ... 
[equations] [horizontal-alignment]
 

asked by TheProgrammer https://tex.stackexchange.com/landing/r/digest?cta=user&id=213708 Score of 6

answered by Guido https://tex.stackexchange.com/landing/r/digest?cta=user&id=16895 Score of 8

8.53.1.3 Cut bar by plane (tikz, 3D)

https://tex.stackexchange.com/landing/r/digest?cta=question&id=654723

How to draw a gray strip realistically cut in half with a red plane? 
My idea is to paint some pieces on another layer. But here the joints turned out ugly. Maybe there is another tricky way? 
\... 
[tikz-pgf] [3d] [asymptote] [tikz-3d]
 

asked by sergiokapone https://tex.stackexchange.com/landing/r/digest?cta=user&id=66024 Score of 6

answered by hpekristiansen https://tex.stackexchange.com/landing/r/digest?cta=user&id=8650 Score of 4

8.53.1.4 How can I make the vertical line of certain rows thicker in LaTeX tables?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=654642

I want to make a table and highlight a certain region in it using thick lines as shown below. 
In my attempt to reproduce the above table, I have used the tabu package to make thick horizontal and ... 
[tables] [tabu]
 

asked by ShaunakP https://tex.stackexchange.com/landing/r/digest?cta=user&id=278567 Score of 6

answered by Zarko https://tex.stackexchange.com/landing/r/digest?cta=user&id=18189 Score of 6

8.53.1.5 Make edges parallel

https://tex.stackexchange.com/landing/r/digest?cta=question&id=654584

The edges are matching. I would like them to be parallel horizontally. 
I tried changing the value of the yshit parameter, but it didn't work. 
\documentclass{article} 
\usepackage{geometry} 
\... 
[tikz-styles] [automata] [edge]
 

asked by B612 https://tex.stackexchange.com/landing/r/digest?cta=user&id=237217 Score of 6

answered by hpekristiansen https://tex.stackexchange.com/landing/r/digest?cta=user&id=8650 Score of 5

8.53.1.6 Confusion about unicode-math symbols w.r.t. math/text mode and format

https://tex.stackexchange.com/landing/r/digest?cta=question&id=654500

Many math symbols defined by unicode-math either "work" in text mode or at least don't produce errors. For example, taking a representative sample from unicode-math-table.tex, the following ... 
[math-mode] [xetex] [luatex] [unicode] [unicode-math]
 

asked by mbert https://tex.stackexchange.com/landing/r/digest?cta=user&id=208544 Score of 6

answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 Score of 8

8.53.1.7 How to Make an Ordinary Page Border Resemble This Tcolorbox

https://tex.stackexchange.com/landing/r/digest?cta=question&id=654818

I know that I can produce (ordinary) page borders, for example, as follows: 
\documentclass{article} 
\usepackage[margin=.75in,paperwidth=16cm,paperheight=24cm]{geometry} 
\usepackage[a4,frame,noinfo,... 
[tcolorbox] [page] [border] [crop] [frame]
 

asked by mlchristians https://tex.stackexchange.com/landing/r/digest?cta=user&id=192836 Score of 5

answered by samcarter_is_at_topanswers.xyz https://tex.stackexchange.com/landing/r/digest?cta=user&id=36296 Score of 4