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  1. Hi people, I would like to know if there is any package that I might be missing because whenever this function is called, it is rendered as a crazy square. What should I do?
  2. What should I do?
    • CommentRowNumber3.
    • CommentAuthorTobyBartels
    • CommentTimeJun 25th 2009

    You probably need to install some fonts. (I can see things like $\mathcal{P}$ on the Lab fine.)

    It all works better if you use Firefox (or almost any modern browser other than Internet Explorer). This page talks about what you can download to see MathML characters in Firefox. Jacques Distler (who's behind the software that the Lab runs on) recommends the STIX fonts, but I use the DejaVu fonts instead. (Sometimes the square-root signs and such are the wrong size, but mostly I find that they look better.)

    If you say what browser you're using on what operating system, including the version numbers, then people might be able to give more specific advice.

    • CommentRowNumber4.
    • CommentAuthorAndrew Stacey
    • CommentTimeJun 26th 2009

    Sounds like a font issue: crazy squares are usually indicative of this. But by "here" do you mean on the lab or the forum? A good thing to look at is Jason Bevin's test pages for the iTeX package: here

    • CommentRowNumber5.
    • CommentAuthorzskoda
    • CommentTimeJul 14th 2009
    Strangely enough this font problem depends on the character in the alphabet. For example, on my laptop with firefox, I can render $\mathcal{B}$ but can not render $\mathcal{A}$.
    • CommentRowNumber6.
    • CommentAuthorTobyBartels
    • CommentTimeJul 14th 2009
    • (edited Jul 14th 2009)

    In that case, I'll bet that you can handle


    and only those, because these were added earlier to Unicode. (See the W3C page on mathcal.)

    For a test, see the bottom of the Sandbox currently. (H'm, DejaVu Sans is a bit funny here, while DejaVu Serif is OK.)

    It might be a good idea to avoid using characters from the extended (high bit) Unicode field. Technically, even mathit should come from that field, but that's not how browsers do it today, while with mathcal they do.

    • CommentRowNumber7.
    • CommentAuthorTobyBartels
    • CommentTimeJul 15th 2009

    (Note that the text font comes first on the Sandbox; but it's the math font that really matters.)