to tilde or not to tilde
barbara beeton
bnb at tug.org
Mon Oct 7 17:00:07 CEST 2019
Dear Paulo Ney,
On Sun, 6 Oct 2019, Paulo Ney de Souza wrote:
> Dear Thomas Schneider,
> NO centered mathematical formula should contain any punctuation at the end
> of the line -- even if it is to terminate a sentence.
>
> Punctuation have a role in typography -- to introduce a pause at reading --
> and with a centered formula that pause already EXIST. The correct is:
>
> \begin{equation}
> A = \pi r ^2
> \end{equation}
>
> even if it is ending a sentence or a paragraph.
>
> Paulo Ney
May I refer you to the AMS Style GGuide, available online from
a link on the oage www.ams.org.authors . See section 13.4,
punctuation.
A space is usually a matter of personal style, but it definitely
helps after a fraction, although AMS practice is more likely to
be a thin space -- \, -- than a full space.
-- bb
> On Sun, Oct 6, 2019 at 1:41 PM Thomas Schneider via texhax <texhax at tug.org>
> wrote:
> Dear TexHaxers:
>
> In a paper we are finishing, my co-author, a physicist, added a
> tilde
> '~' in front of the period '.' or comma ',' at the end of
> equations,
> for example
>
> \begin{equation}
> A = \pi r ^2 ~.
> \end{equation}
>
> He says ``It is a stylistic convention that some physicists use.
> But
> it's not universal practice.''
>
> Is it a typographically recommended practice or should it be
> avoided?
>
> Here's a minimal example for you to try:
>
> \documentclass[12pt]{article}
> \begin{document}
> Here's an example without a tilde:
> \begin{equation}
> A = \pi r ^2.
> \end{equation}
> Here's an example with a tilde:
> \begin{equation}
> A = \pi r ^2 ~. \\
> \end{equation}
> \end{document}
>
> Tom
>
> Thomas D. Schneider, Ph.D.
> Senior Investigator
> National Institutes of Health
> National Cancer Institute
> Center for Cancer Research
> RNA Biology Laboratory
> Biological Information Theory Group
> Frederick, Maryland 21702-1201
> schneidt at mail.nih.gov
> https://alum.mit.edu/www/toms
>
>
>
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