7.43.2 Greatest hits from previous weeks

7.43.2.1 How to typeset subscript in usual text mode?
7.43.2.2 How to type special/accented letters in LaTeX?
7.43.2.3 tlmgr cannot setup TLPDB
7.43.2.4 How to write cases with LaTeX?
7.43.2.5 How can I manually install a package on MiKTeX (Windows)
7.43.2.6 \mathbb Z  yields undefined control sequence error
7.43.2.7 "inputenc Error: Unicode char \u8" error while trying to write a degree symbol (invisible character)
7.43.2.1 How to typeset subscript in usual text mode?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=1013

It's easy to make subscripts in math mode: $a_i$. 
How do I make a subscript outside math environment, likethis? 
[subscripts]
 
asked by P Shved https://tex.stackexchange.com/landing/r/digest?cta=user&id=280 264 votes
answered by Stefan Kottwitz https://tex.stackexchange.com/landing/r/digest?cta=user&id=213 172 votes
7.43.2.2 How to type special/accented letters in LaTeX?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=8857

How to type these special letters from European languages in latex? 
A~\[Currency], A~(c), and L'? 
[symbols] [languages] [characters] [accents]
 
asked by user2918 https://tex.stackexchange.com/landing/r/digest?cta=user&id=2918 210 votes
answered by Kit https://tex.stackexchange.com/landing/r/digest?cta=user&id=791 178 votes
7.43.2.3 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 223 votes
answered by ppr https://tex.stackexchange.com/landing/r/digest?cta=user&id=28474 212 votes
7.43.2.4 How to write cases with 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 
I appreciate any help. 
Edited: I'm sorry to add this ... 
[math-mode] [cases]
 
asked by MaryA~ https://tex.stackexchange.com/landing/r/digest?cta=user&id=65856 169 votes
answered by Ignasi https://tex.stackexchange.com/landing/r/digest?cta=user&id=1952 122 votes
7.43.2.5 How can I manually install a package on MiKTeX (Windows)

https://tex.stackexchange.com/landing/r/digest?cta=question&id=2063

I'm new to LaTeX, investigating using it for some work projects.  I'm using MiKTeX on Windows.  My employer's locked-down network blocks the application's automatic installation function.  I can take ... 
[packages] [installing] [miktex] [windows]
 
asked by mbmcavoy https://tex.stackexchange.com/landing/r/digest?cta=user&id=902 232 votes
answered by Stefan Kottwitz https://tex.stackexchange.com/landing/r/digest?cta=user&id=213 182 votes
7.43.2.6 \mathbb Z  yields undefined control sequence error

https://tex.stackexchange.com/landing/r/digest?cta=question&id=38769

I am using WinEdt 6 for compiling my TeX documents. I am getting an error with contains the line $\mathbb{Z}$ showing that it is undefined control sequence. How should I rectify it? Should I include ... 
[math-mode] [errors] [symbols]
 
asked by Ramana Venkata https://tex.stackexchange.com/landing/r/digest?cta=user&id=10154 200 votes
7.43.2.7 "inputenc Error: Unicode char \u8" error while trying to write a degree symbol (invisible character)

https://tex.stackexchange.com/landing/r/digest?cta=question&id=4268

No matter how I try to do it I always get the following error : 
! Package inputenc Error: Unicode char \u8:A^\[DiscretionaryHyphen] not set up for use with LaTeX. 
I have tried using A^\[DiscretionaryHyphen]A^\[DiscretionaryHyphen]A^\[DiscretionaryHyphen]$^{\circ}$, \deg, \textdegree, ... 
[symbols] [unicode]
 
asked by levesque https://tex.stackexchange.com/landing/r/digest?cta=user&id=10 100 votes
answered by Antal Spector-Zabusky https://tex.stackexchange.com/landing/r/digest?cta=user&id=1425 92 votes