9.49.1 Top new questions this week

9.49.1.1 How to create an overlapped colored equation?
9.49.1.2 set union operation in tikz
9.49.1.3 align by any character in tabular
9.49.1.4 Properly creating a boxed vertical vector of math symbols in TikZ
9.49.1.5 Forest: increasing horizontal separation by level bottom-up
9.49.1.6 Exercise 8.6 of The TeXbook
9.49.1.7 TikZ decoration markings not on the path
9.49.1.1 How to create an overlapped colored equation?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=691775

I wonder if there is a tex library that can create an equation like this (found in this paper and the authors actually create a figure for this, not in tex) 
With some research, I see that the arrows ... 
[equations] [color] [witharrows]
 
asked by dragon_and_dracula https://tex.stackexchange.com/landing/r/digest?cta=user&id=281646 Score of 14
answered by muzimuzhi Z https://tex.stackexchange.com/landing/r/digest?cta=user&id=79060 Score of 23
9.49.1.2 set union operation in tikz

https://tex.stackexchange.com/landing/r/digest?cta=question&id=691650

Is there a way to get the 'set union' of two closed paths in tikz? 
To show what I mean, consider the following MWE 
\documentclass{article} 
\usepackage{tikz} 
\begin{document} 
\begin{tikzpicture} 
\... 
[tikz-pgf]
 
asked by N. Virgo https://tex.stackexchange.com/landing/r/digest?cta=user&id=12461 Score of 8
answered by Juan CastaA~+-o https://tex.stackexchange.com/landing/r/digest?cta=user&id=231368 Score of 8
9.49.1.3 align by any character in tabular

https://tex.stackexchange.com/landing/r/digest?cta=question&id=691889

How would one align the RHS by the "8"s in the following? I tried adding another column, and then left aligning the "999998" right, and the "00001" left, but there was a ... 
[tables] [horizontal-alignment]
 
asked by Sam https://tex.stackexchange.com/landing/r/digest?cta=user&id=289717 Score of 7
answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 Score of 8
9.49.1.4 Properly creating a boxed vertical vector of math symbols in TikZ

https://tex.stackexchange.com/landing/r/digest?cta=question&id=692044

I am trying to create a boxed vertical vector of math symbols in TikZ. My goal is to have all the terms centered in the box (vertically and horizontally) and have the box auto-sized to fit around ... 
[tikz-pgf] [amsmath]
 
asked by jared https://tex.stackexchange.com/landing/r/digest?cta=user&id=189423 Score of 5
answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 Score of 6
9.49.1.5 Forest: increasing horizontal separation by level bottom-up

https://tex.stackexchange.com/landing/r/digest?cta=question&id=691893

I used qtree for a while and although there's not much that it can do that forest can't, there is one effect that qtree has by default that I quite like, which is that it automatically increases the ... 
[tikz-pgf] [forest] [trees]
 
asked by argo https://tex.stackexchange.com/landing/r/digest?cta=user&id=301278 Score of 5
answered by cfr https://tex.stackexchange.com/landing/r/digest?cta=user&id=39222 Score of 5
9.49.1.6 Exercise 8.6 of The TeXbook

https://tex.stackexchange.com/landing/r/digest?cta=question&id=691863

Exercise 8.6. Assume that the category codes of plain TEX are in force, except that the characters ^^A, ^^B, ^^C, ^^M belong respectively to categories 0, 7, 10, and 11. What tokens are produced from ... 
[tex-core] [token-lists]
 
asked by Atom https://tex.stackexchange.com/landing/r/digest?cta=user&id=207649 Score of 5
answered by LdBeth https://tex.stackexchange.com/landing/r/digest?cta=user&id=246082 Score of 7
9.49.1.7 TikZ decoration markings not on the path

https://tex.stackexchange.com/landing/r/digest?cta=question&id=691751

My 
question 
is 
related 
to 
TikZ 
Decoration markings 
While compiling the code, there are no errors 
TeXLive.net 
\documentclass[tikz]{standalone} 
\begin{document} 
\usetikzlibrary{decorations.markings} 
\... 
[tikz-pgf] [tikz-decorations] [bezier]
 
asked by hbghlyj https://tex.stackexchange.com/landing/r/digest?cta=user&id=260481 Score of 5
answered by SebGlav https://tex.stackexchange.com/landing/r/digest?cta=user&id=204164 Score of 5