12.6.2 Greatest hits from previous weeks

12.6.2.1 Why does \\ not return a new line in an equation?
12.6.2.2 bibtex vs. biber and biblatex vs. natbib
12.6.2.3 How do I put text over symbols?
12.6.2.4 Using the \tab Command
12.6.2.5 Command for argmin or argmax?
12.6.2.6 BibTeX: How to reduce long author lists to "Firstauthor et al."?
12.6.2.7 pdfTeX error (font expansion): auto expansion is only possible with scalable
12.6.2.1 Why does \\ not return a new line in an equation?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=194236

\begin{equation*}\label{eq:pareto mle2} 
A_0 = \frac{1}{(\alpha+t_x)^{r+s+x}}{}_2F_1\left(r+s+x,x+1;r+s+x+1;\frac{\alpha-\beta}{\alpha + t_x} \right ) "\\\" <br> 
- \frac{1}{(\alpha+T)^{r+s+x}}{}... 
[equations] [line-breaking]
 
asked by user3714137 https://tex.stackexchange.com/landing/r/digest?cta=user&id=60029 Score of 123
answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 Score of 57
12.6.2.2 bibtex vs. biber and biblatex vs. natbib

https://tex.stackexchange.com/landing/r/digest?cta=question&id=25701

I've heard of many different bibliography-related packages/platforms/?. What's the difference between the following, which is good for what tasks, advantages/disadvantages, which one is the most ... 
[bibliographies] [biblatex] [bibtex] [natbib] [biber]
 
asked by doncherry https://tex.stackexchange.com/landing/r/digest?cta=user&id=4012 Score of 690
12.6.2.3 How do I put text over symbols?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=74125

This is difficult for me to explain, but how do I put words over a symbol? For instance, I want to add words over an equal sign. Anyone know the command/syntax for that? 
Also adding ^ doesn't cut it..... 
[syntax]
 
asked by Lemon https://tex.stackexchange.com/landing/r/digest?cta=user&id=10554 Score of 178
answered by Gonzalo Medina https://tex.stackexchange.com/landing/r/digest?cta=user&id=3954 Score of 133
12.6.2.4 Using the \tab Command

https://tex.stackexchange.com/landing/r/digest?cta=question&id=198432

I have seen several cases of people using the \tab command to insert a specific amount of space between objects (as opposed to the \hfill command which uses any remaining space).  However, I have ... 
[spacing]
 
asked by Mathematician https://tex.stackexchange.com/landing/r/digest?cta=user&id=49199 Score of 119
answered by Mathematician https://tex.stackexchange.com/landing/r/digest?cta=user&id=49199 Score of 131
12.6.2.5 Command for argmin or argmax?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=5223

How can you get the argmin or argmax in Latex? Two solutions I found are: 
\underset{x}{\operatorname{argmax}} 
\DeclareMathOperator*{\argmin}{arg\,min} 
Any other ideas? 
[1] http://www.breakthru.... 
[math-mode] [symbols] [math-operators]
 
asked by Alejandro https://tex.stackexchange.com/landing/r/digest?cta=user&id=1128 Score of 326
answered by Jan Hlavacek https://tex.stackexchange.com/landing/r/digest?cta=user&id=396 Score of 363
12.6.2.6 BibTeX: How to reduce long author lists to "Firstauthor et al."?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=26575

I have several entries in my list of references that include of the order of 40 authors. 
Is there a way to make bibtex automatically reduce these lists to e.g. the first name + "et al."? 
I don't want ... 
[bibtex] [author-number]
 
asked by fuenfundachtzig https://tex.stackexchange.com/landing/r/digest?cta=user&id=1442 Score of 174
12.6.2.7 pdfTeX error (font expansion): auto expansion is only possible with scalable

https://tex.stackexchange.com/landing/r/digest?cta=question&id=10706

I'm using a custom class file. 
My main file looks like this: 
\documentclass[12pt,a4paper]{thesis} 
\begin{document} 
\frontmatter 
\pagenumbering{alph} 
\pagenumbering{roman} 
\clearpage 
... 
[fonts] [errors] [microtype] [font-expansion]
 
asked by Elmer https://tex.stackexchange.com/landing/r/digest?cta=user&id=3338 Score of 122