4.3.1 Top new questions this week

4.3.1.1 How to draw the parabola with equation x = y^2/2?

https://tex.stackexchange.com/questions/410144/how-to-draw-the-parabola-with-equation-x-y2-2

I want to draw the following diagram 
Here is my MWE with (ps-tricks) 
\documentclass[x11names]{standalone} 
\usepackage{pst-plot, pst-node} 
\usepackage{auto-pst-pdf} 
\begin{document} 
...
 

- asked by marya (19 votes), answered by cmhughes (12 votes)

4.3.1.2 Understanding line height / line spacing / baselinskip in LaTeX

https://tex.stackexchange.com/questions/410250/understanding-line-height-line-spacing-baselinskip-in-latex

I tried for a while now to figure out how LaTeX is determining the spacing between two lines but instead of getting clearer I'm more and more confused (and it seems the Internet is mostly confused,  ...
 

- asked by Eduard Braun (14 votes), answered by David Carlisle (15 votes)

4.3.1.3 How do I make a rectangular plot with annotations?

https://tex.stackexchange.com/questions/410283/how-do-i-make-a-rectangular-plot-with-annotations

I want to plot the following 
But I am unable to add the details(the C's with their pointing segment) and unable to keep the $x$-axis shorter than $y$-axis as shown in the diagram. Here is my MWE 
...
 

- asked by marya (12 votes), answered by TorbjA~,rn T. (11 votes)

4.3.1.4 How to define new command for \ e_1,\cdots, e_n\ ?

https://tex.stackexchange.com/questions/410356/how-to-define-new-command-for-e-1-cdots-e-n

I want to make a new command that has three arguments: 
symbol (e, \omega,\cdots) 
superscript or subscript (^ or _) 
counter (n) 
If n=3 then returns 
\set{a}{^}{3}    ====> output: {a^1,a^2,a^3} 
...
 

- asked by C.F.G (11 votes), answered by Werner (11 votes)

4.3.1.5 How to check if command is used more than once?

https://tex.stackexchange.com/questions/410814/how-to-check-if-command-is-used-more-than-once

I want LaTeX to throw an error message if I use a command more than once in a file. 
This is allowed 
\documentclass{article} 
\newcommand{\mycommand}{Test} 
\begin{document} 
\mycommand 
...
 

- asked by Sr. Schneider (10 votes), answered by Skillmon (14 votes)

4.3.1.6 Structuring a document using comments

https://tex.stackexchange.com/questions/410007/structuring-a-document-using-comments

When I write in LaTeX, what I enjoy doing is to first write an outline and the proceedings of my argumentation, and then later filling that in with text. 
Now, often, my argumentational structure has  ...
 

- asked by Lukas (10 votes), answered by samcarter (12 votes)

4.3.1.7 Command that returns current font size as a length?

https://tex.stackexchange.com/questions/409930/command-that-returns-current-font-size-as-a-length

I need a way to get the current fontsize as a length. 
I hope I didn't overlook anything that already provides this. What I found that I can do 
\makeatletter 
\newlength{\fsize} 
...
 

- asked by Eduard Braun (10 votes), answered by Manuel (8 votes)