\cancel not working correctly

[Duane Nykamp]

Loading the extension

<script type="text/x-mathjax-config">
MathJax.Hub.Config({
TeX: { extensions: ["cancel.js"] }
});

I tried the lines
$$ \cancel{\int_0^1 f(x)dx} $$
$$ \bcancel{\int_0^1 f(x)dx} $$
$$ \xcancel{\int_0^1 f(x)dx} $$

The last two look fine, but for the first one (\cancel), the slash is
below the integral and only the right half shows.

This is with Firefox 11 on Linux, MathJax 2, and HTML-CSS. All look
fine with the renderer set at MathML.

Duane

[Duane Nykamp]

Actually, it's not \cancel as opposed to the other versions.
Whichever cancel command appears first, it display incorrectly,
shifted down so that only the top part of it is showing. The second
and subsequent equations with a cancel command show up fine.

[Davide P. Cervone]

This seems to be a bug in Firefox 11. It does not occur in FF 10 or
below for me (in Mac OS X).

I'll have to look into it further to see if I can figure anything out.

Davide

[Duane Nykamp]

Oh, that explains it. I thought it was working before. Thanks.

Duane

[Duane Nykamp]

Here's a workaround that seems to fix it, though I haven't tested in
other browsers. At the end of the paragraph preceding the \cancel, I
put in a

<span style="visibility:hidden">$\cancel{}$</span>

so that the first real \cancel becomes the second \cancel and is
displayed properly.

Duane

[Davide P. Cervone]

I was considering suggesting that, but wanted to do some testing
before doing so. But I am traveling right now so don't have much time
to do that until I get back in a couple of days.

You might try using

<div style="visibility:hidden; position:absolute; top:0, height:0">$
\cancel{}$</div>

instead, so that it does not interfere with the layout.

Davide

[Duane Nykamp]

Even better. That way I don't have to worry about sticking it at the
end of the paragraph to keep it from messing up the formatting.
Thanks for answering even while traveling.

Duane