11.59.2 Greatest hits from previous weeks

11.59.2.1 How can I write cases with grouping braces on both left and right side, and split the condition into two lines in LaTeX?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=240868

The code I used to write 
is this one 
$$ 
X(m,n)= 
\begin{cases} 
x(n),\\ 
x(n-1)\\ 
x(n-1) 
\end{cases} 
$$ 
But I don't know how to write this one 
Also, what if I want to write this 
[math-mode] [cases]
 

asked by MaryA~ https://tex.stackexchange.com/landing/r/digest?cta=user&id=65856 Score of 208

answered by Ignasi https://tex.stackexchange.com/landing/r/digest?cta=user&id=1952 Score of 149

11.59.2.2 How to write two dot above a letter?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=152951

the two dots above a letter represents two derivative of varible t. 
My method: 
\documentclass[UTF8]{ctexart} 
\usepackage{amsmath} 
\usepackage{amssymb} 
\usepackage{graphicx} 
\usepackage{epstopdf} 
\... 
[math-mode] [accents]
 

asked by mma https://tex.stackexchange.com/landing/r/digest?cta=user&id=43727 Score of 155

answered by Cain https://tex.stackexchange.com/landing/r/digest?cta=user&id=28428 Score of 210

11.59.2.3 How to write 'A~\[Currency]' and other umlauts and accented letters in bibliography?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=57743

How to write in bibliography (package natbib) letter "a" with two dots above? Specially, I mean the word BirkhA~\[Currency]user. 
Is there a general rule or way how to write such umlauts or other accented letters ... 
[bibtex] [accents] [characters]
 

asked by Laura https://tex.stackexchange.com/landing/r/digest?cta=user&id=14475 Score of 439

answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 Score of 593

11.59.2.4 Error in TeX Live a^\200\223 Font ... not loadable: Metric (TFM) file not found

https://tex.stackexchange.com/landing/r/digest?cta=question&id=75166

I freshly installed 'basic' version of TeX Live 2012 (not full, only basic version). 
I have following line in my code: 
\usepackage[T1]{fontenc} 
I get following error: 
(/usr/local/texlive/2012/texmf-... 
[fonts] [errors] [packages] [texlive] [font-encodings]
 

asked by abhinavkulkarni https://tex.stackexchange.com/landing/r/digest?cta=user&id=12992 Score of 159

11.59.2.5 Nice scientific pictures show off

https://tex.stackexchange.com/landing/r/digest?cta=question&id=158668

Task 
Show off your best scientific illustration ! 
The main purpose of this question is to share beautiful scientific pictures, preferably with an educational aspect. 
Content 
Your post must contain ... 
[diagrams] [3d] [technical-drawing] [fun] [big-list]
 

asked by Thomas https://tex.stackexchange.com/landing/r/digest?cta=user&id=42660 Score of 580

answered by Charles Staats https://tex.stackexchange.com/landing/r/digest?cta=user&id=484 Score of 349

11.59.2.6 How can I make an enumerate list start at something other than 1?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=142

Sometimes, I want to have enumerate lists in LaTeX start at other than the first value (1, a, i, etc.) How can I make an enumerate list start at an arbitrary value? 
[lists] [numbering] [enumerate]
 

asked by vanden https://tex.stackexchange.com/landing/r/digest?cta=user&id=93 Score of 641

answered by ShreevatsaR https://tex.stackexchange.com/landing/r/digest?cta=user&id=48 Score of 774

11.59.2.7 How to influence the position of float environments like figure and table in LaTeX?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=39017

How to influence the position of float environments like figure and table in LaTeX? 
This is a general question and should collect useful answers for all users. I hope we can use this as a reference 
[floats] [positioning]
 

asked by Marco Daniel https://tex.stackexchange.com/landing/r/digest?cta=user&id=5239 Score of 741

answered by Frank Mittelbach https://tex.stackexchange.com/landing/r/digest?cta=user&id=10109 Score of 1062