Why isn't this working? $\require{cancel}$
$ \cancel{x} $
I copied it directly from "Crossing things out" on MathJax basic tutorial and quick reference
EDIT: It's been fixed
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1 Answer
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As it says in this answer, the $\LaTeX$ command \require{cancel} needs to appear in a MathJax formula before using \cancel{...}. I have added it $\underline{\text{here}}\require{cancel}$ so that the cancel in the next paragraph will render properly. Right click on the underlined "here" and choose "Show Math As > TeX Commands". You can also do the same with the cancelled $x$ in the next paragraph.
It works if you start with \require{cancel}:
$\cancel{x}$
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$\begingroup$ That actually won't work for me. I think it's a bug or something, because if I do some more MathJax below it, it just starts working! Weird. $\endgroup$– GᴇᴏᴍᴇᴛᴇʀCommented Aug 4, 2014 at 5:22
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$\begingroup$ What do you mean it doesn't work for you? Do you not see the slashed out $x$ in my answer? If I add the requisite code to your question, I see the slashed out $x$. $\endgroup$– robjohn ModCommented Aug 4, 2014 at 6:09
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$\begingroup$ I saw that Martin Sleziak added then removed the code to your question, and I saw the slashed out $x$ while it was there. $\endgroup$– robjohn ModCommented Aug 4, 2014 at 6:10
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$\begingroup$ @robjohn I have only added (mathjax) tag: meta.math.stackexchange.com/posts/16489/revisions (BTW I see the slashed x rendered differently in your answer and in the question - in the questions instead of slashed x is seed red cancel.) $\endgroup$ Commented Aug 4, 2014 at 6:54
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$\begingroup$ @MartinSleziak: I saw the $\cancel{x}$ rendered properly after the question showed as having been edited by you, so I assumed that you had added the
\require{cancel}to the question. It reverted to the red cancel before 5 minutes, so I figured you had taken it out. In any case, since the\require{cancel}is not in the question, it is not applied there. I can edit the question, but it would make the question seem pointless. $\endgroup$– robjohn ModCommented Aug 4, 2014 at 7:07 -
$\begingroup$ Woah I guess all this convo happened while I was sleeping. Um yeah I guess it's working now (maybe because RobJohn changed it?). It wasn't working last night. $\endgroup$– GᴇᴏᴍᴇᴛᴇʀCommented Aug 4, 2014 at 22:42
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$\begingroup$ @Zack: did you notice the change to your question that I made to enable the
\cancel? $\endgroup$– robjohn ModCommented Aug 4, 2014 at 23:21 -
$\begingroup$ The "\require" thing? Also how did you do a quote in a comment? The carrot ">" symbol doesn't work $\endgroup$– GᴇᴏᴍᴇᴛᴇʀCommented Aug 4, 2014 at 23:22
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$\begingroup$ Ok I see. I selected you as my answer thanks $\endgroup$– GᴇᴏᴍᴇᴛᴇʀCommented Aug 4, 2014 at 23:34
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$\begingroup$ @Zack: The greater-than-sign should work to quote things. Do you have an example of where it doesn't work? $\endgroup$– robjohn ModCommented Aug 5, 2014 at 0:01
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$\begingroup$ It's not working here in the comments. <quote >quote $\endgroup$– GᴇᴏᴍᴇᴛᴇʀCommented Aug 5, 2014 at 0:23
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$\begingroup$ @Zack: comments are meant to be short. You can only quote lines in a post and the '>' needs to be at the beginning of the line. See this help page. $\endgroup$– robjohn ModCommented Aug 5, 2014 at 0:33
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$\begingroup$ @Zack if you mean
\cancel, that is done by putting the srting in backticks. It has similar background to quotes, though it's different on HTML level, and meant for code fragments. $\endgroup$– user147263Commented Aug 5, 2014 at 0:37 -
\cancelon this page should work. $\endgroup$