I just asked this question, but my inline math didn't work until I put a backslash before the dollar signs \$like so\$.
Why is the backslash required? That isn't the case on other sites.
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3\$\begingroup\$ I came here to ask if it's just me, and found it was already asked. I confirm the issue, and added a screenshot to illustrate the issue. \$\endgroup\$– MołotCommented Jun 1, 2020 at 8:15
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2 Answers
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Sometimes, when MathJax is added to a site when it's mature and has a lot of posts already, Stack Exchange staff chooses to use \$ delimiters instead of $. This is to prevent things like
There are a few decent options in the $10-$20 range.
being displayed as
There are a few decent options in the \$10-\$20 range.
There are a handful of other sites in the network where this the case: for a complete list, see Which Stack Exchange sites use MathJax?.
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\$\begingroup\$ That's cool. Thanks. Out of interest, how would one write $10-$20 in sites which do not use \$? \$\endgroup\$ Commented Jun 1, 2020 at 9:30
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4\$\begingroup\$ Surprise, surprise (I didn't know it either, I just tried): that's possible by using
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Because when we added MathJax to the site, Stack Exchange staff decided to use \$ as delimiters rather than $ because many posts would be impacted otherwise. They cite an analysis by one of our citizens:
There are 349 posts that contain dollar signs, more than twice my estimate for posts that might benefit from MathJax (162). 137 of the 349 contain 2 dollar signs, if that matters.
— Miniman Nov 12 '15 at 0:37
You can see the original post requesting MJ on RPG here, and the post announcing its going live here.
(I know this doesn't really add much to Glorfindel's answer—really I just wanted to link both of those posts into this conversation, and my conscience wouldn't let me leave them in comments that really do answer the question.)
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\$\begingroup\$ Thanks for sharing that info! I think the answer does add something :) \$\endgroup\$– V2Blast ModCommented Jun 1, 2020 at 20:20