5.11.1 Top new questions this week

5.11.1.1 How do you make your own symbol when Detexify fails?

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=480768

My first visit to TeX.SX came when I was looking for a symbol for a twisted product: 
I knew about Detexify and the Comprehensive LaTeX Symbol List, but I could not find the symbol there. I tried  ... 
[math-mode] [symbols] [math-operators]
 

asked by Sandy G https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=125871 37 votes

answered by Sandy G https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=125871 43 votes

5.11.1.2 Drawing ramified coverings with tikz

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=481125

I want to draw a diagram similar to this one: 
For that I started with the following code: 
\begin{tikzpicture} 
\draw (0,0) node {$Y$}; 
\draw (0,2) node {$X$}; 
\draw[<-] (0,0.35) -- (0,1.65)  ... 
[tikz-pgf]
 

asked by Gabriel Ribeiro https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=102658 12 votes

answered by marmot https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=121799 15 votes

5.11.1.3 Difference between -  and  - in TikZ

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=481195

Based on this tutorial, I understand symbols -| and |- are used to draw perpendicular lines. 
But I wish to understand the difference between the two. 
There are the following related questions: 
... 
[tikz-pgf]
 

asked by subham soni https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=41885 11 votes

answered by JouleV https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=156344 20 votes

5.11.1.4 What was added in the latest edition of Math into LaTeX?

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=480750

My current main references for LaTeX are The LaTeX Companion 2nd edition by Mittelbach and Goosens and More Math into LaTeX 4th edition by Gratzer. Both are excellent and serve me well, but the former  ... 
[books] [book-design]
 

asked by Peter Flom https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=4719 9 votes

answered by KJO https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=170109 6 votes

5.11.1.5 How can I replace every global instance of "x[2]" with "x_2"

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=481546

Thanks to Bruno for suggesting that for my specific case, where my results come from Mathematica, it's simply much easier to change the output in there using trivial replacement rules. However, this  ... 
[macros] [shorthands]
 

asked by Brad https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=183274 9 votes

answered by egreg https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=4427 9 votes

5.11.1.6 How to align my equation to left?

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=480865

I want to display four equations which have different length. I want they align left like this. 
But my code give this 
The following are my code: 
$$\begin{aligned} p(a) &=p(a) p(a \rightarrow  ... 
[math-mode] [align]
                                                                                  

                                                                                  
 

asked by chole https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=175997 8 votes

answered by JouleV https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=156344 6 votes

5.11.1.7 First index is not integer using foreach loop from 0

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=481622

I am trying to draw a tree using tikzpicture like this: 
\documentclass{article} 
\usepackage{tikz} 
\usetikzlibrary{math} 
\begin{document} 
\begin{tikzpicture} 
\tikzstyle{node}=[circle,  ... 
[tikz-pgf] [foreach]
 

asked by landings https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=184377 7 votes