3.6.2 Greatest hits from previous weeks

Greatest hits from previous weeks:

3.6.2.1 How does one insert a backslash or a tilde (~) into LaTeX?

http://tex.stackexchange.com/questions/9363/how-does-one-insert-a-backslash-or-a-tilde-into-latex

How does one insert a "\" (backslash) into the text of a LaTeX document? 
And how does one insert a "~" (tilde)? (If you insert \~, it will give you a tilde as an accent over the following letter.) 
...
 

- asked by Brian M. Hunt (538 votes), answered by Jouni K. SeppA~\[Currency]nen (537 votes)

3.6.2.2 Subfigures side by side with captions

http://tex.stackexchange.com/questions/119984/subfigures-side-by-side-with-captions

I am using the following code to put my two figures side by side with different captions, 
\begin{figure*}[t!] 
\centering 
\begin{subfigure}[b]{0.5\textwidth} 
\centering 
...
 

- asked by Sait (32 votes), answered by Luan Resende (43 votes)