8.83.1 Top new questions this week

8.83.1.1 Minus sign too long
8.83.1.2 How to draw any polygram using tikz?
8.83.1.3 Old mathbook's thick font
8.83.1.4 Why does an empty command not return an empty string?
8.83.1.5 Equation: boxed split inside align
8.83.1.6 Changing opacity of included graphics without tikz
8.83.1.7 Are there packages available on MiKTeX only (not on TeX Live)?
8.83.1.1 Minus sign too long

https://tex.stackexchange.com/landing/r/digest?cta=question&id=669131

The minus sign in arevmath is too long. In particular, it is longer than the plus sign. Is there a way to correct this? 
\documentclass{article} 
\usepackage{arevmath} 
\usepackage{xcolor} 
% \... 
[math-mode] [arev]
 
asked by user94293 https://tex.stackexchange.com/landing/r/digest?cta=user&id=94293 Score of 13
answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 14
8.83.1.2 How to draw any polygram using tikz?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=669141

I've been trying to create a command to generalize this but I don't know what I'm doing wrong. Maybe it's more complex than I thought. How should I do it? Please include descriptions to steps because ... 
[tikz-pgf]
 
asked by Vampi https://tex.stackexchange.com/landing/r/digest?cta=user&id=224811 Score of 10
answered by Jasper Habicht https://tex.stackexchange.com/landing/r/digest?cta=user&id=47927 Score of 12
8.83.1.3 Old mathbook's thick font

https://tex.stackexchange.com/landing/r/digest?cta=question&id=668872

I did a lot of research to re-create the style of the following math book written in 1979: 
There are many questions around recreating old fonts such as 
font-of-old-math-books , how-to-write-like-old-... 
[fonts] [fontsize] [math-fonts]
 
asked by Uwe.Schneider https://tex.stackexchange.com/landing/r/digest?cta=user&id=160425 Score of 10
answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 Score of 15
8.83.1.4 Why does an empty command not return an empty string?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=669122

I want to check if a command returns something or not. I tried the following but it is not working. Why is the output of the following code false? 
\documentclass{article} 
\usepackage{etoolbox} 
\... 
[macros] [etoolbox]
 
asked by Yannic https://tex.stackexchange.com/landing/r/digest?cta=user&id=162300 Score of 6
answered by Qrrbrbirlbel https://tex.stackexchange.com/landing/r/digest?cta=user&id=16595 Score of 4
8.83.1.5 Equation: boxed split inside align

https://tex.stackexchange.com/landing/r/digest?cta=question&id=668913

How to box the second split environment ? 
Bonus: to box only a part of the split environment content it so I can add a \Longleftrightarrow before the box. 
MWE: 
\documentclass{article} 
\usepackage{... 
[equations] [align] [split] [box]
 
asked by coucou https://tex.stackexchange.com/landing/r/digest?cta=user&id=283412 Score of 6
answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 7
8.83.1.6 Changing opacity of included graphics without tikz

https://tex.stackexchange.com/landing/r/digest?cta=question&id=668964

I can make a figure translucent using the tikz package 
\begin{tikzpicture} 
\node[opacity=0.5] at (0,0) {\includegraphics[width=0.4\textwidth]{myfigure.png}}; 
\end{tikzpicture} 
But, I want to ... 
[tikz-pgf] [includegraphics] [transparency]
                                                                                  

                                                                                  
 
asked by user182849 https://tex.stackexchange.com/landing/r/digest?cta=user&id=182849 Score of 6
answered by Ulrike Fischer https://tex.stackexchange.com/landing/r/digest?cta=user&id=2388 Score of 14
8.83.1.7 Are there packages available on MiKTeX only (not on TeX Live)?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=669307

In the description of this new package: 
is written that it is available in MiKTeX. 
Why is it not on TeX Live, too? 
Is it a matter of time, an author's choice, or what else? 
I thought that the two ... 
[distributions]
 
asked by CarLaTeX https://tex.stackexchange.com/landing/r/digest?cta=user&id=101651 Score of 5