volume integrals
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	fredw
	Jul 9 2015, 11:09 AM

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The help for displaying a formula suggests to use PNG images in order to write \oiint and \oiiint:

https://en.wikipedia.org/wiki/Help:Displaying_a_formula#.5Coiint_and_.5Coiiint_as_PNG_images
https://en.wikipedia.org/wiki/Help:Displaying_a_formula#Oriented_.5Coiint_and_.5Coiiint_as_PNG_images

I actually first noticed that on https://en.wikipedia.org/wiki/Gauss%27s_law#Integral_form

This results in poor rendering even in the MathML mode. This is also not accessible, or more precisely it splits the MathML formula into several parts (MathML and HTML <img>) which can confuse assistive technologies.

The MathML operator dictionary contains the following characters for that purpose (http://www.w3.org/TR/MathML3/appendixc.html):

∮ ∮ contour integral
∯ ∯ surface integral
∰ ∰ volume integral
∲ ∲ clockwise contour integral
∳ ∳ anticlockwise contour integral

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Status	Assigned	Task
Resolved	Physikerwelt	T105310 Need a way to generate MathML for contour/surface/volume integrals
Resolved	Physikerwelt	T133809 the new commands should pass texvcjs
Open	None	T143520 Improve mathoid font to support new integral symbols that work well in MathML, but have problems in the fallback modes

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fredw created this task.Jul 9 2015, 11:09 AM

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Physikerwelt claimed this task.Nov 10 2015, 9:57 AM

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@fredw:
I'd use the following naming convention
0222E \oint
0222F \oiint
02230 \oiiint
02231 \intclockwise
02232 \varointclockwise
02233 \ointctrclockwise
cf. https://github.com/physikerwelt/utf8tex/blob/master/unicode2tex.csv
or would you prefere
https://github.com/physikerwelt/utf8tex/blob/master/unicode2classicTex.csv

I don't have preference, but please check http://ctan.org/pkg/unicode-math and their GitHub repo.

Mail original -----

De: "Physikerwelt" <no-reply@phabricator.wikimedia.org>
À: "fred wang" <fred.wang@free.fr>
Envoyé: Mardi 10 Novembre 2015 11:11:20
Objet: [Maniphest] [Commented On] T105310: Need a way to generate MathML for contour/surface/volume integrals

Physikerwelt added a comment.

TASK DETAIL

https://phabricator.wikimedia.org/T105310

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To: Physikerwelt
Cc: Pkra, Physikerwelt, Aklapper, fredw, mobrovac

At least this recommondation comes from https://raw.githubusercontent.com/physikerwelt/utf8tex/master/unicode.xml which was recommended to me by David Carlisle, so I think it is all right.

cf. https://github.com/wikimedia/MathJax/pull/11

I think unicode-math is also based on David Carlisle's unicode.xml so that should be the same commands. (but please check)

Danny_B moved this task from Unsorted to Math (LaTeX, MathML) on the Accessibility board.Jan 22 2016, 9:56 PM

change was merged. Should be resolved now

Physikerwelt created subtask T133809: the new commands should pass texvcjs.Apr 27 2016, 8:45 PM

Physikerwelt closed subtask T133809: the new commands should pass texvcjs as Resolved.Aug 19 2016, 12:02 PM

Physikerwelt created subtask T143520: Improve mathoid font to support new integral symbols that work well in MathML, but have problems in the fallback modes.Aug 21 2016, 3:35 PM

Physikerwelt mentioned this in T161009: Improve size of new Counter Integral symbols.Mar 21 2017, 5:21 PM

Aklapper added a project: Math.Jun 24 2020, 5:53 AM