8.10.1 Top new questions this week

8.10.1.1 Problems testing for a leap year using expl3

https://tex.stackexchange.com/landing/r/digest?cta=question&id=633179

For a recent project I tried to become acquainted with LaTeX3 but unfortunately, I have some difficulties and cannot find the issue, which is why I'm asking for a helpful hint. 
In the project, I want ... 
[macros] [conditionals] [expl3] [latex3]
 

asked by Sam https://tex.stackexchange.com/landing/r/digest?cta=user&id=117727 Score of 9

answered by Phelype Oleinik https://tex.stackexchange.com/landing/r/digest?cta=user&id=134574 Score of 15

8.10.1.2 \cline equivalent that allows `(lr)` trim on either side

https://tex.stackexchange.com/landing/r/digest?cta=question&id=632715

I am looking for the equivalent of \cline{1-1} that does not affect the vertical spacing, but with the option to be able to apply a trim such as (lr) that \cmidrule allows. 
The MWE below produces: 
I ... 
[tables] [booktabs] [cline]
 

asked by Peter Grill https://tex.stackexchange.com/landing/r/digest?cta=user&id=4301 Score of 9

answered by L.J.R. https://tex.stackexchange.com/landing/r/digest?cta=user&id=106776 Score of 5

8.10.1.3 How to write an E with a circle around the middle line?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=633116

I want to type the symbol 
in latex. What should I do? I guess I have to define the symbol. How to do it in latex? 
[symbols]
 

asked by will_cheuk https://tex.stackexchange.com/landing/r/digest?cta=user&id=263162 Score of 9

answered by Steven B. Segletes https://tex.stackexchange.com/landing/r/digest?cta=user&id=25858 Score of 16

8.10.1.4 How to create a coordinate grid in Exam class in multicol with the number at top

https://tex.stackexchange.com/landing/r/digest?cta=question&id=633035

I'm trying to figure out how to change the following.  When I write the following code, I get the second question label at the bottom of the image.  If I add in a // after the second question before ... 
[tikz-pgf] [multicol]
 

asked by Leeper https://tex.stackexchange.com/landing/r/digest?cta=user&id=263110 Score of 6

answered by Ignasi https://tex.stackexchange.com/landing/r/digest?cta=user&id=1952 Score of 7

8.10.1.5 TikZ rotation inadvertently shifts node

https://tex.stackexchange.com/landing/r/digest?cta=question&id=632873

I'm trying to illustrate some inputs (a time-series) going into a model. The arrow is meant to be centred below the dots. I'm using positioning to get the relative positions right. If I rotate the ... 
[tikz-pgf] [rotating]
 

asked by stevew https://tex.stackexchange.com/landing/r/digest?cta=user&id=187661 Score of 6

answered by Zarko https://tex.stackexchange.com/landing/r/digest?cta=user&id=18189 Score of 10

8.10.1.6 Correct spacing for Hodge star operator

https://tex.stackexchange.com/landing/r/digest?cta=question&id=632798

In my textbook, the Hodge star operator is represented as an asterisk character with the same spacing as in the following image: 
But when I use the * character in the obvious way: 
\[ 
\ast d \ast \phi ... 
[math-operators]
 

asked by Patrick Collins https://tex.stackexchange.com/landing/r/digest?cta=user&id=41965 Score of 6

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 4

8.10.1.7 Centering an Initfamily Letter within a Colorbox and Sizing It for Use as a Two-Color Lettrine

https://tex.stackexchange.com/landing/r/digest?cta=question&id=632584

Consider the code 
\documentclass{book} 
\usepackage{lettrine} 
\usepackage{lmodern} 
\usepackage{xcolor} 
\usepackage{scalefnt} 
\usepackage[tracking=true]{microtype} 
\input GoudyIn.fd 
\newcommand*\... 
[horizontal-alignment] [lettrine] [colorbox] [fbox] [drop-cap]
 

asked by mlchristians https://tex.stackexchange.com/landing/r/digest?cta=user&id=192836 Score of 6

answered by ThA~(c)rA~..se https://tex.stackexchange.com/landing/r/digest?cta=user&id=7883 Score of 4