11.71.2 Greatest hits from previous weeks

11.71.2.1 Forcing linebreaks in \url

https://tex.stackexchange.com/landing/r/digest?cta=question&id=3033

This question led to a new package: 
xurl 
I wish to typeset some relatively long URLs in a piece of text, and when I use \url{..}, the resulting text does not respect the margin boundaries that govern ... 
[line-breaking] [urls]
 

asked by Suresh https://tex.stackexchange.com/landing/r/digest?cta=user&id=103 Score of 372

answered by Suresh https://tex.stackexchange.com/landing/r/digest?cta=user&id=103 Score of 267

11.71.2.2 Math symbol question: Vertical bar for ''evaluated at ...''

https://tex.stackexchange.com/landing/r/digest?cta=question&id=40160

How do I insert the line "|" after the equation in LaTeX (see image below)? 
I'm using LyX so if you can point me to the symbol of that line is also OK. 
I don't know if this line has a proper name so ... 
[math-mode] [symbols] [lyx]
 

asked by cidadao https://tex.stackexchange.com/landing/r/digest?cta=user&id=10511 Score of 204

11.71.2.3 How do you get \mathbb 1  to work (characteristic function of a set)?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=26637

I am trying to get the digit one printed the \mathbb{} font in math mode, however the command 
\mathbb{1} 
outputs some rubbish. I certainly saw the character I am after in some pdf's generated from ... 
[math-mode] [formatting]
 

asked by Grzenio https://tex.stackexchange.com/landing/r/digest?cta=user&id=3329 Score of 266

answered by Stefan Kottwitz https://tex.stackexchange.com/landing/r/digest?cta=user&id=213 Score of 292

11.71.2.4 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 175

answered by Werner https://tex.stackexchange.com/landing/r/digest?cta=user&id=5764 Score of 188

11.71.2.5 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 138

11.71.2.6 Superscript outside math mode

https://tex.stackexchange.com/landing/r/digest?cta=question&id=47324

What is the easiest way to superscript text outside of math mode? 
For example, let's say I want to write the $n^{th}$ element, but without the math mode's automatic italicization of the th.  And what ... 
[superscripts]
 

asked by jamaicanworm https://tex.stackexchange.com/landing/r/digest?cta=user&id=9757 Score of 586

answered by Werner https://tex.stackexchange.com/landing/r/digest?cta=user&id=5764 Score of 855

11.71.2.7 Tabular: title above and caption below?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=15282

I have a table that I would like to put the Title above and a caption below. Intuitively (though I know how troublesome intuition can be in something like LaTeX), I should be able to do as below: 
\... 
[tables] [captions]
 

asked by Alec https://tex.stackexchange.com/landing/r/digest?cta=user&id=2457 Score of 80