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on my system calligraphic lower case as in
$\mathcal{Pic}$
does not display. Is that just me and is it otherwise supposed to work?
If this is generally not supposed to work, then I’ll change the notation at Picard scheme etc.
Normally, TeX only has uppercase calligraphic letters. Mind you, maybe in iTeX it should work, but I'm not surprised if it doesn't.
Test:
H'm, that actually seems to be working for me!
Toby’s test works for me, running Chrome on OS X 10.8.5
First search hit for “MathJaX mathcal lowercase” is a big page about MathJaX commands and contains this paragraph:
Whether lower-case letters are displayed in blackboard-bold, or not, depends on the fonts being used. The MathJax web-based fonts don’t have lowercase blackboard-bold, but the STIX fonts do; so users with the STIX fonts installed will be able to display lowercase blackboard-bold letters.
Now that’s about \mathbb but I wouldn’t be surprised to learn that it also holds for \mathcal since in TeX, the usual \mathcal (from AMSTeX) doesn’t have lowercase letters.
So whether you see them or not depends on how your browser and system are configured.
Okay, thanks for the feedback. The question is really to which extent this is supposed to work. On some machines entries such as Picard scheme in its current form do not display correctly. Do we want to declare that it’s the user’s fault, or should we avoid using lower case calligraphics.
I’d tend to the latter, I would want and re-edit Picard scheme replacing the “\mathcal{Pic}” with something else. But if there is some general disagreement here, then I won’t.
It works in MathML / Firefox (with STIX fonts). For MathJax, I suppose there is a chance that it will render in “TeX fonts” instead, which would break things.
Zhen Lin, that’s the point of my comment. If the user has the right fonts, it displays correctly. If the user doesn’t, then MathJaX won’t download the right fonts to display it. So if (as is generally held to be the case) the goal is to be viewable with minimal extra configuration, lowercase mathcal should be avoided.
All right. I will go then and change \cal{Pic} to something else. But maybe later.
Another reason to avoid lowercase calligraphy is if we ever want to use the option to export an Instiki page to actual LaTeX. There are a lot of things that we do that would break that, but this is one of them.
I had wanted to use that option. But it didn’t really do what I’d expect.
What’s wrong with a compromise like ?
Or .
Those are usually what I see in print (when done with LaTeX). Although they look very ugly on my particular system (because the ‘’ is rendered too short).
@Todd, that’s what I meant. Forgot about the iTeX (or whatever) turning adjacent letters into upright characters.
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