9.55.2 Greatest hits from previous weeks

9.55.2.1 Underscores in words (text)
9.55.2.2 What is the LaTeX command for "em dash" (a^\200\224)?
9.55.2.3 tlmgr cannot setup TLPDB
9.55.2.4 How do I align an image to center?
9.55.2.5 Write pseudo code in latex
9.55.2.6 How to add an empty line between paragraphs?
9.55.2.7 How to write two dot above a letter?
9.55.2.1 Underscores in words (text)

https://tex.stackexchange.com/landing/r/digest?cta=question&id=48632

How can I produce the text Word_one_two in LaTeX? 
I tried: 
Samp\_Dist\_Corr 
But, it doesn't quite look right. Also, I want it in the typewriter font, so actually, I'm doing: 
\texttt{Samp\_Dist\... 
[characters] [typewriter]
 
asked by Flux Capacitor https://tex.stackexchange.com/landing/r/digest?cta=user&id=11728 Score of 239
answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 Score of 201
9.55.2.2 What is the LaTeX command for "em dash" (a^\200\224)?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=53413

I am trying to insert the symbol in the title of the question, which I copied from a PDF article, but it appears as space in the output file. What is the corresponding LaTeX command? 
[symbols] [punctuation]
 
asked by Tarek https://tex.stackexchange.com/landing/r/digest?cta=user&id=13964 Score of 364
answered by Keks Dose https://tex.stackexchange.com/landing/r/digest?cta=user&id=4736 Score of 391
9.55.2.3 tlmgr cannot setup TLPDB

https://tex.stackexchange.com/landing/r/digest?cta=question&id=137428

I'm trying to update my installation of texlive 2013 under Ubuntu 13.10. 
However, I followed the instruction on this answer, but I get an error 
(running on Debian, switching to user mode!) 
cannot ... 
[errors] [texlive] [ubuntu]
 
asked by adn https://tex.stackexchange.com/landing/r/digest?cta=user&id=7561 Score of 239
9.55.2.4 How do I align an image to center?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=53862

How do I align an image to center? 
In a beamer presentation I have a 2-3 items on a slide followed by an image. 
The image is not wide enough to cover whole slide, so it leaves around 30% space from ... 
[beamer] [horizontal-alignment]
 
asked by epsilon8 https://tex.stackexchange.com/landing/r/digest?cta=user&id=12860 Score of 80
answered by gcedo https://tex.stackexchange.com/landing/r/digest?cta=user&id=13680 Score of 87
9.55.2.5 Write pseudo code in latex

https://tex.stackexchange.com/landing/r/digest?cta=question&id=163768

I am trying to write pseudo code in my paper. Here is the snippet and image like what I want.  Can some one please help me to format it. 
\begin{algorithm} 
\caption{Euclida^\200\231s algorithm}\label{euclid} 
\... 
[algorithms]
 
asked by cyclic https://tex.stackexchange.com/landing/r/digest?cta=user&id=47334 Score of 133
answered by karlkoeller https://tex.stackexchange.com/landing/r/digest?cta=user&id=27635 Score of 182
9.55.2.6 How to add an empty line between paragraphs?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=135134

I have two sections which I'd like to separate by an empty line. Every time I press Enter, LyX removes that empty line between paragraphs. How do I prevent this? 
[spacing] [lyx]
 
asked by goldisfine https://tex.stackexchange.com/landing/r/digest?cta=user&id=37301 Score of 156
answered by Werner https://tex.stackexchange.com/landing/r/digest?cta=user&id=5764 Score of 170
9.55.2.7 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 140
answered by Cain https://tex.stackexchange.com/landing/r/digest?cta=user&id=28428 Score of 194