2.42.1 Top new questions this week

2.42.1.1 Seasonal Challenge (Contributions from TeXing Dead Welcome)

http://tex.stackexchange.com/questions/336768/seasonal-challenge-contributions-from-texing-dead-welcome

It being the last day of the year when the dead walk among the living, I'm hoping to find the spookiest, creepiest images haunting answers to this question. 
Answers should be created by human- or  ...
 

- asked by cfr (44 votes), answered by Fran (45 votes)

2.42.1.2 Infinite loops in TeX

http://tex.stackexchange.com/questions/336425/infinite-loops-in-tex

Some day I will learn how TeX actually works; in the meantime I ask here ;-) 
The code 
\def\x{Hello!\par\x} 
\x 
gets stuck in an infinite loop, producing some thousands pages in a few seconds (as I  ...
 

- asked by campa (21 votes), answered by egreg (23 votes)

2.42.1.3 Why does CTAN now look like I'm on LSD?

http://tex.stackexchange.com/questions/336812/why-does-ctan-now-look-like-im-on-lsd

It seems that the CTAN network has been updated to appear as if users are on hard drugs or in the twilight zone. The moving background is making me dizzy. 
This is not the same as What is CTAN.org  ...
 

- asked by macmadness86 (20 votes), answered by Henri Menke (13 votes)

2.42.1.4 Test if the value of a counter belongs to a given list of values

http://tex.stackexchange.com/questions/337175/test-if-the-value-of-a-counter-belongs-to-a-given-list-of-values

This must be a LateX 101 question, so I ask for your kindness 
I want to make a choice based on the value of a theorem counter. 
I use the xifthen package (especially the \isin function, which tests  ...
 

- asked by jm.ferrard (12 votes), answered by Steven B. Segletes (11 votes)

2.42.1.5 Defining a custom TikZ arrowtip (circle with plus)

http://tex.stackexchange.com/questions/336878/defining-a-custom-tikz-arrowtip-circle-with-plus

I need to design a custom arrowtip in TikZ, but so far I haven't had much luck. I have been able to define a circle arrow with the arrows meta library, but I cannot figure out how to add the plus sign  ...
 

- asked by FHannes (10 votes), answered by David Carlisle (12 votes)

2.42.1.6 How to make column bold in array?

http://tex.stackexchange.com/questions/336549/how-to-make-column-bold-in-array

\begin{align*} 
\begin{array}{cc|>{\boldsymbol}cclccl} 
X&Y&\neg&X&\rightarrow(&Y&\rightarrow&X))\\ 
\hline 
...
 

- asked by Jacob (10 votes), answered by Werner (7 votes)

2.42.1.7 Subscript after \middle is positioned too high

http://tex.stackexchange.com/questions/336255/subscript-after-middle-is-positioned-too-high

I Have this code : 
\left [ 1 - \frac{ \sum_{1}^{n}\left ( \frac {\sum\left ( P(O_k)) \right )} 
{\sum R_j} \middle|_i \times C_i \right )}{CT}  \right ] \times 100 
Which gives me this output : 
...
 

- asked by Bilal (10 votes), answered by siracusa (11 votes)