8.28.1 Top new questions this week

8.28.1.1 How to change "." to \cdot automatically

https://tex.stackexchange.com/landing/r/digest?cta=question&id=642371

By the David Carlisle's answer, Automatically use \cdot 
We can input *, TeX turns * into \cdot command. 
How can I change * by ".". 
\documentclass{article} 
\mathcode`\*="8000 
{\catcode`\*... 
[symbols] [mathcode]
 

asked by Nam Tran Le https://tex.stackexchange.com/landing/r/digest?cta=user&id=193916 Score of 8

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 11

8.28.1.2 Using Chinese in a table

https://tex.stackexchange.com/landing/r/digest?cta=question&id=642489

When entering Chinese in a table, despite trying to limit the column size with p{5cm}, the phrase isn't going to the line below. 
\documentclass{article} 
\usepackage{fontspec} 
\usepackage{array} 
\... 
[tables] [line] [chinese]
 

asked by Camille https://tex.stackexchange.com/landing/r/digest?cta=user&id=269438 Score of 7

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 8

8.28.1.3 When to use which alignment environment?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=642412

There seem to be a whopping align, aligned, alignedat, alignat, xalignat, xxalignat and falign in amsmath / mathtools - some also in there starred version. 
I just find sloppy statements like: 
"... 
[align] [amsmath] [mathtools] [alignat]
 

asked by Suuuehgi https://tex.stackexchange.com/landing/r/digest?cta=user&id=37806 Score of 7

answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 Score of 4

8.28.1.4 conflict between siunitx and unicode-math (greek letter unit)

https://tex.stackexchange.com/landing/r/digest?cta=question&id=642807

In optics, the "dioptre" unit's symbol is I^\264 (lowercase delta). As long as I don't use unicode-math, the following code gives the expected result, but with it, the unit is missing in the ... 
[siunitx] [unicode-math] [optical]
 

asked by Miyase https://tex.stackexchange.com/landing/r/digest?cta=user&id=267211 Score of 6

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

8.28.1.5 Best method to animate a step by step state space diagram construction in TikZ

https://tex.stackexchange.com/landing/r/digest?cta=question&id=642435

Introduction 
A long time ago I started learning how to use TikZ and I created some not very well made diagrams. One of those diagrams is a state space representation of linear dynamical systems. When ... 
[tikz-pgf] [diagrams] [animate]
 

asked by FHZ https://tex.stackexchange.com/landing/r/digest?cta=user&id=140133 Score of 6

answered by AlexG https://tex.stackexchange.com/landing/r/digest?cta=user&id=1053 Score of 6

8.28.1.6 Is there a way to add italic correction at the end of inline math?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=642201

I would like to add italic correction at the end of inline math, depending on the italic correction of the last math character. Here is a MWE showing why I would like to have that: 
%! TEX program = ... 
[math-mode] [fonts] [luatex] [kerning] [italic-correction]
 

asked by red_trumpet https://tex.stackexchange.com/landing/r/digest?cta=user&id=18357 Score of 6

answered by red_trumpet https://tex.stackexchange.com/landing/r/digest?cta=user&id=18357 Score of 5

8.28.1.7 Modify This Tikzpicture

https://tex.stackexchange.com/landing/r/digest?cta=question&id=642759

I am trying to create a tikz image as follows: 
Its 
\documentclass[border=1cm]{standalone} 
\usepackage[dvipsnames]{xcolor} 
\usepackage{newtxtext} 
\usepackage{tikz} 
\usetikzlibrary{decorations.text, ... 
[tikz-pgf] [tikz-styles]
 

asked by Daniel James https://tex.stackexchange.com/landing/r/digest?cta=user&id=104402 Score of 5

answered by SebGlav https://tex.stackexchange.com/landing/r/digest?cta=user&id=204164 Score of 7