2

This might be more of a typography question. Say have two equations, and I put them in an aligned environment.

example

\documentclass{article}
\usepackage{amsmath}

\begin{document}


The following equations are true:
\begin{align}
a^2 + b^2 & = c^2 \
x^2 + y^2 & = z^2.
\end{align}


\end{document}

Do I need to add a semicolon or a comma after c^2? I know that in the case of a cases environment it is recommended to do so.

user3796139
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    Did you also read the answer. According to this style guide (page 109) a semicolon is recommended. But I am no mathematician so I do not know if there is a concrete rule. – Roland Oct 07 '21 at 06:40
  • @Roland I did. If I understand correctly, a semicolon or a comma is recommended in the case of a cases environment. I want to know if the same standard holds for an align environment of a few equations. – user3796139 Oct 07 '21 at 06:45
  • In french typography rules, definitively. Not sure how much international this is then, but I would recommend one. – Archange Oct 07 '21 at 06:47
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    As rule of thumb, I typeset such stuff as if it would be linear, and then add some 2D arrangements to enhance readability. So yes, I'd use the same punctuation as if it were a linear sentence. – gernot Oct 07 '21 at 07:17

1 Answers1

3

Short answer: add punctuation after your c^2.

Long answer:

In general maths is punctuated just as normal text is. The following is a short extract from a document I've been preparing for many years, eventually to be submitted to TUG.

enter image description here

It is called Mathematics with Style and deals in general terms the accepted typeset appearance of mathematics, but not as a "How to do it with (La)TeX".

Peter Wilson
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