3.35.1 Top new questions this week

3.35.1.1 Why is LaTeX free?

https://tex.stackexchange.com/questions/394477/why-is-latex-free

The fact that LateX is not paid seems to me as good as it is strange, being that many people work developing it. 
So..why is LaTeX free?
 

- asked by Hernan Miraola (36 votes), answered by David Carlisle (40 votes)

3.35.1.2 Soviet Union Postal-code-style digits in Latex

https://tex.stackexchange.com/questions/394616/soviet-union-postal-code-style-digits-in-latex

For some problem for textbook I need the digits 0...9 like in zip-codes on the Soviet-Union postal envelopes, 
like this 
Does anybody know the possible font or package for getting them in LaTeX? 
...
 

- asked by torcli (32 votes), answered by David Carlisle (28 votes)

3.35.1.3 Why does \color blue  after \paragraph ...  color the paragraph title blue?

https://tex.stackexchange.com/questions/393927/why-does-colorblue-after-paragraph-color-the-paragraph-title-blue

MWE: 
\documentclass{article} 
\usepackage{color} 
\begin{document} 
\paragraph{Why am I blue?} 
{\color{blue} Only I am supposed to be blue!} 
\end{document} 
Output (plus my scribble): 
Question:  ...
 

- asked by Rebecca J. Stones (16 votes), answered by Heiko Oberdiek (18 votes)

3.35.1.4 How to make the next compilation longer?

https://tex.stackexchange.com/questions/393818/how-to-make-the-next-compilation-longer

My question is an extension of How to prolong compilation time while engaging in leisure activities?. 
I would like to make consequtive compilations longer, for example: 
\newif\ifpaid 
...
 

- asked by PrzemysAo\202aw Scherwentke (12 votes), answered by Steven B. Segletes (8 votes)

3.35.1.5 Force periods in "Ph.D. thesis" in biblatex

https://tex.stackexchange.com/questions/393773/force-periods-in-ph-d-thesis-in-biblatex

Using biblatex and Biber, I want my bibliography to say "Ph.D. thesis" (with periods) rather than "PhD thesis" (without). MWE: 
\documentclass{article} 
\usepackage{biblatex} 
\addbibresource{refs.bib} 
...
 

- asked by John J. Camilleri (11 votes), answered by moewe (16 votes)

3.35.1.6 What is (or was) fsfTeX?

https://tex.stackexchange.com/questions/394232/what-is-or-was-fsftex

I noticed in this LaTeX configuration document a reference to something called "fsfTeX." Quote: 
Since we have been prompted, despite our misgivings, to document how to do this by members of the  ...
 

- asked by dunnl (9 votes), answered by David Carlisle (14 votes)

3.35.1.7 Argument in Discrete Mathematics

https://tex.stackexchange.com/questions/394453/argument-in-discrete-mathematics

This is my code: 
\begin{tabular}{cccc} 
$P(1)$ \\ 
$P(1)$ \\ 
$\forall n \in \N ((P(n) \land P(n+1) \implies P(n+2))$ \\ 
\hline 
$\forall n \in \N (P(n))$ \\ 
\end{tabular} 
It looks like this: 
I  ...
 

- asked by tigerustin (8 votes), answered by ClA~(c)ment (8 votes)