11.51.1 Top new questions this week

11.51.1.1 Symbols for A.P. Morse's book in Set Theory
11.51.1.2 Sierpinski Integral in LaTeX
11.51.1.3 forcing line break in url while preserving link url, without using \href
11.51.1.4 Customized alignment environment with indentation effect
11.51.1.5 Ignore the last line of a file when using `\VerbatimInput`
11.51.1.6 3D projective transformations on text in LuaMetaFun
11.51.1.7 Need help in aligning math as desired with `amsmath` `align` environment
11.51.1.1 Symbols for A.P. Morse's book in Set Theory

https://tex.stackexchange.com/landing/r/digest?cta=question&id=748602

I am trying to figure out how I can reproduce some symbols which were introduced by A.P. Morse in his 1965 book A Theory of Sets. Here is a sample page: 
Most symbols already exist in LaTeX packages, ... 
[symbols]
 
asked by Siminore https://tex.stackexchange.com/landing/r/digest?cta=user&id=14743 Score of 9
answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 12
11.51.1.2 Sierpinski Integral in LaTeX

https://tex.stackexchange.com/landing/r/digest?cta=question&id=748806

I recently came across this meme. The image purportedly shows a Japanese integration quiz with questions that become increasingly ridiculous, culminating in the final problem: the "Sierpinski ... 
[equations] [compiling] [performance]
 
asked by barley9 https://tex.stackexchange.com/landing/r/digest?cta=user&id=408297 Score of 7
answered by MS-SPO https://tex.stackexchange.com/landing/r/digest?cta=user&id=245790 Score of 5
11.51.1.3 forcing line break in url while preserving link url, without using \href

https://tex.stackexchange.com/landing/r/digest?cta=question&id=748738

Sometimes I want to force a line break in a url. However, the method I know for doing so, adding to \UrlSpecials, leaves the new command character in the url, rendering it invalid. For example: 
\... 
[line-breaking] [urls] [href]
                                                                                  

                                                                                  
 
asked by Karl Berry https://tex.stackexchange.com/landing/r/digest?cta=user&id=63279 Score of 7
answered by Ulrike Fischer https://tex.stackexchange.com/landing/r/digest?cta=user&id=2388 Score of 4
11.51.1.4 Customized alignment environment with indentation effect

https://tex.stackexchange.com/landing/r/digest?cta=question&id=748899

I have a tex file 
\documentclass{article} 
\usepackage{amssymb,mathtools} 
\mathtoolsset{showonlyrefs} 
\begin{document} 
\begin{align} 
U_{t}^{r, x, \xi + h \eta} (y) & = \begin{aligned}[t] 
& \... 
[macros] [align] [vertical-alignment]
 
asked by Akira https://tex.stackexchange.com/landing/r/digest?cta=user&id=161639 Score of 6
answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 6
11.51.1.5 Ignore the last line of a file when using `\VerbatimInput`

https://tex.stackexchange.com/landing/r/digest?cta=question&id=748783

I'd like to ignore the last line of a file when using \VerbatimInput, for example 
\documentclass{article} 
\usepackage{fancyvrb} 
\begin{filecontents*}{\jobname.example.aux} 
% \def\fooa{abc} 
% \def\... 
[verbatim] [fancyvrb]
 
asked by myhsia https://tex.stackexchange.com/landing/r/digest?cta=user&id=299948 Score of 6
answered by Marijn https://tex.stackexchange.com/landing/r/digest?cta=user&id=89417 Score of 3
11.51.1.6 3D projective transformations on text in LuaMetaFun

https://tex.stackexchange.com/landing/r/digest?cta=question&id=748708

I recently asked about performing 2D affine transformations on text in LuaMetaFun: linear transformation of letter in MetaPost. 
I want to perform 3D projective transformations on text in LuaMetaFun. 
... 
[context] [3d] [metapost] [transformation] [luametatex]
 
asked by Jasper https://tex.stackexchange.com/landing/r/digest?cta=user&id=319072 Score of 6
answered by Max Chernoff https://tex.stackexchange.com/landing/r/digest?cta=user&id=270600 Score of 3
11.51.1.7 Need help in aligning math as desired with `amsmath` `align` environment

https://tex.stackexchange.com/landing/r/digest?cta=question&id=748935

Code Snippet (some dummy math equations): 
\begin{align} 
\rho &= 
\frac {\langle \hat s \rangle}{\sqrt{\langle \hat s^2 \rangle - \langle \hat s \rangle^2}} \\ 
\rho &\underset{\... 
[align] [amsmath]
 
asked by akopty https://tex.stackexchange.com/landing/r/digest?cta=user&id=248313 Score of 5
answered by Werner https://tex.stackexchange.com/landing/r/digest?cta=user&id=5764 Score of 4