3.45.1 Top new questions this week

3.45.1.1 Plotting Archimedes's spiral

https://tex.stackexchange.com/questions/405571/plotting-archimedess-spiral

I need help to plot the following Arhimede's spiral, which in polar coordinates has the equation 
r=t, t\in [0,4*pi] 
I used the code: 
\documentclass{article} 
\usepackage{pgfplots} 
...
 

- asked by Cris (12 votes), answered by Henri Menke (18 votes)

3.45.1.2 Feasible TeX projects to get started with (expl3?)

https://tex.stackexchange.com/questions/405283/feasible-tex-projects-to-get-started-with-expl3

I'm a pretty decent LaTeX user in the sense that I write LaTeX documents all the time and I can do pretty much everything that I need to do (with some occasional help from you lovely people). But I  ...
 

- asked by dbmrq 12votes

3.45.1.3 Overprinting spot colors

https://tex.stackexchange.com/questions/405094/overprinting-spot-colors

I am trying to produce a pdf in a CMYK colorspace with an additional spotcolor, and make sure black on a spotcolor background is "overprinted", i.e. that if I look at the color separation of the  ...
 

- asked by mrf (12 votes), answered by Heiko Oberdiek (10 votes)

3.45.1.4 How to switch to math mode for a whole ROW of a tabular or to text mode for a whole ROW of an array?

https://tex.stackexchange.com/questions/406120/how-to-switch-to-math-mode-for-a-whole-row-of-a-tabular-or-to-text-mode-for-a-wh

Looking at another question, I was wondering if there is a way to set a whole row of a tabular to math mode (without repeating $...$ for every cell) or a whole row of an array to text mode (without  ...
 

- asked by CarLaTeX (10 votes), answered by Sergei Golovan (5 votes)

3.45.1.5 Why does xgalley require a blank line before \end document ?

https://tex.stackexchange.com/questions/405980/why-does-xgalley-require-a-blank-line-before-enddocument

The following MWE gives this error: 
! Improper \prevdepth. 
\newpage ...everypar {}\fi \par \ifdim \prevdepth 
>\z@ \vskip -\ifdim \prevd... 
l.5  ...
 

- asked by David Purton (10 votes), answered by Joseph Wright (9 votes)

3.45.1.6 Why does equation environment not give an error without the amsmath package?

https://tex.stackexchange.com/questions/405138/why-does-equation-environment-not-give-an-error-without-the-amsmath-package

As far as I understand the equation environment is defined in the amsmath package so one would expect an error while trying to compile the following document with pdflatex: 
\documentclass{article} 
...
 

- asked by DarthPaghius (10 votes), answered by Mico (12 votes)

3.45.1.7 how to use overbrace and underbrace when their arguments include alignment symbol

https://tex.stackexchange.com/questions/405854/how-to-use-overbrace-and-underbrace-when-their-arguments-include-alignment-symbo

I have an split equation. 
\documentclass{article} 
\usepackage{mathtools} 
\begin{document} 
\begin{equation*} 
\label{eq:elig} 
\begin{split} 
\Omega_{v} := \{(a,\sigma)|a \in A &\wedge b \in B  ...
 

- asked by A.Loc (7 votes), answered by egreg (7 votes)