10.28.2 Greatest hits from previous weeks

10.28.2.1 How to write 'A~\[Currency]' and other umlauts and accented letters in bibliography?
10.28.2.2 How to write a function (piecewise) with bracket outside?
10.28.2.3 Change line spacing inside the document
10.28.2.4 How to align a set of multiline equations
10.28.2.5 Making the bibliography appear in the table of contents
10.28.2.6 Change image size
10.28.2.7 How to typeset the symbol '^' (caret/circumflex/hat)
10.28.2.1 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 424
answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 Score of 578
10.28.2.2 How to write a function (piecewise) with bracket outside?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=32140

How to write this Piecewise function using LaTeX? 
I tried 
$ 
\begin{array}{cc} 
\{ & 
\begin{array}{cc} 
0 & x\leq 0 \\ 
\frac{100-x}{100} & 0\leq x\leq 100 \\ 
0 & ... 
[math-mode] [equations] [brackets]
 
asked by GarouDan https://tex.stackexchange.com/landing/r/digest?cta=user&id=5314 Score of 215
answered by Ant https://tex.stackexchange.com/landing/r/digest?cta=user&id=6984 Score of 263
10.28.2.3 Change line spacing inside the document

https://tex.stackexchange.com/landing/r/digest?cta=question&id=83855

This is my code 
\documentclass[12pt,a4paper]{book} 
\renewcommand{\baselinestretch}{1.5} 
\begin{document} 
\include{Chapter1} 
\end{document} 
I have please a question: 
I would change the line ... 
[line-spacing]
 
asked by researcher https://tex.stackexchange.com/landing/r/digest?cta=user&id=16097 Score of 183
answered by Peter Grill https://tex.stackexchange.com/landing/r/digest?cta=user&id=4301 Score of 166
10.28.2.4 How to align a set of multiline equations

https://tex.stackexchange.com/landing/r/digest?cta=question&id=44450

I am trying to align a set of long equations, that are themselves align environments as most of them are spreading on multiple lines. 
Currently I just have a sequence of align environments, with ... 
[equations] [align]
 
asked by SeismicVibrations https://tex.stackexchange.com/landing/r/digest?cta=user&id=11737 Score of 133
10.28.2.5 Making the bibliography appear in the table of contents

https://tex.stackexchange.com/landing/r/digest?cta=question&id=8458

I need to make my (BibTeX) references section appear in the table of contents of my LaTeX document (documentclass: article), with section numbering too. 
My approach until now has been making a new ... 
[sectioning] [table-of-contents] [bibliographies]
 
asked by Genba https://tex.stackexchange.com/landing/r/digest?cta=user&id=2311 Score of 250
answered by lockstep https://tex.stackexchange.com/landing/r/digest?cta=user&id=510 Score of 188
10.28.2.6 Change image size

https://tex.stackexchange.com/landing/r/digest?cta=question&id=64836

I'm trying to change the image size (make it look smaller than the original). 
I tried with the next code but the image still shows at its original size. 
\begin{figure}[h!] 
\centering 
\... 
[graphics]
 
asked by Enrique https://tex.stackexchange.com/landing/r/digest?cta=user&id=16973 Score of 122
answered by DJJerome https://tex.stackexchange.com/landing/r/digest?cta=user&id=2863 Score of 116
10.28.2.7 How to typeset the symbol '^' (caret/circumflex/hat)

https://tex.stackexchange.com/landing/r/digest?cta=question&id=77646

I need to display the symbol '^' 
d <- dist(fascores, method = "euclidean")^2 
How do I do that? 
[symbols]
                                                                                  

                                                                                  
 
asked by Cost https://tex.stackexchange.com/landing/r/digest?cta=user&id=17205 Score of 320
answered by Qrrbrbirlbel https://tex.stackexchange.com/landing/r/digest?cta=user&id=16595 Score of 419