1.16.1 Top new questions this week

1.16.1.1 How do I make customized $\sum$ operator?

http://tex.stackexchange.com/questions/275639/how-do-i-make-customized-sum-operator

How can I create the following symbols? 
\circlearrowleft or \circlearrowright centered in \sum operator. 
EDITED: 
So, 
In \usepackage{esint} package, \ointclockwise and \ointctrclockwise;   how to  ...
 

- asked by A~\226zgA~\274r (14 votes), answered by egreg (23 votes)

1.16.1.2 Triangles inside Triangles, Fractals to an arbitrary depth

http://tex.stackexchange.com/questions/276665/triangles-inside-triangles-fractals-to-an-arbitrary-depth

What I am trying to do is to create an image such as that below, that is, triangles inside triangles. I can get a single triangle created and I commented out the parts that create circles (for a Venn  ...
 

- asked by Relative0 (12 votes), answered by percusse (9 votes)

1.16.1.3 bad kerning of italics in beamer

http://tex.stackexchange.com/questions/275678/bad-kerning-of-italics-in-beamer

\documentclass{beamer} 
\begin{document} 
\begin{frame} 
``Here is text that ends in \emph{italics!}'' 
\bigskip 
``Here is text that ends in \emph{italics!}\kern1.5pt'' 
\end{frame} 
\end{document} 
...
 

- asked by Seamus (10 votes), answered by egreg (11 votes)

1.16.1.4 Short and long presentations in one beamer document

http://tex.stackexchange.com/questions/276119/short-and-long-presentations-in-one-beamer-document

I look for a sensible way to keep different versions of the same talk in one beamer file: e.g., 15 min and 1 hour versions, where some content is common, but some is not. Is there a nice way to toggle  ...
 

- asked by dzeltzer (9 votes), answered by Harish Kumar (12 votes)

1.16.1.5 Ignore expansion in edef

http://tex.stackexchange.com/questions/276003/ignore-expansion-in-edef

I'd like to populate a tabular environment programmatically using an edef. 
For simplicity, I brought a simple example: 
\let\\=\relax 
\let\hline=\relax 
\edef\mmm{\hline A & B\\} 
...
 

- asked by abforce (9 votes), answered by David Carlisle (10 votes)

1.16.1.6 align vs. equation: Which way is typograpically preferred?

http://tex.stackexchange.com/questions/276517/align-vs-equation-which-way-is-typograpically-preferred

The main differences between align and equation are the spaces and that align cannot be used with split as far as I know. 
But what would be from a typographic point of view the preferred practice  ...
 

- asked by student (8 votes), answered by Mico (13 votes)

1.16.1.7 Disallowing paragraph breaks inside environment

http://tex.stackexchange.com/questions/276283/disallowing-paragraph-breaks-inside-environment

An environment, singlepar, is supposed to contain a single paragraph. This means that there must be no paragraph breaks inside the code it wraps: 
\begin{singlepar} 
Right. 
\end{singlepar} 
...
 

- asked by Kalrish (8 votes), answered by egreg (6 votes)