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I am trying to insert a special math alphabet in an equation for a physics quantity called "cavity finesse". It is basically represented by a fancy letter F, which looks like what's shown in the picture. (ref: http://mirror.unl.edu/ctan/macros/latex/contrib/mathalfa/mathalfa.pdf).

After doing some research, it seems that I need to download a math package in order to use it, but most of which is not free. All I need is this only one letter from the package, and will probably use it for a couple of times only. Is there any easy way to insert it? enter image description here

enter image description here I am using /mathcal{F} right now (shown in the bottom picture), but it does not look as great.

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do you want those particular fonts, or will the standard \mathcal{F} work? – David Carlisle Mar 14 '14 at 23:47
I am using \mathcal{F} right now, but it just does not look great. Yes, I would prefer these particular fonts, or something similar to that, if I can get it. I tried to download a free version of mathtime package, but had trouble installing it in my computer. It was a file named "mtp2lite.zip.tpm", I couldn't open it at all. – Shun Mar 15 '14 at 0:09
Why don't you take a look at tug.dk/FontCatalogue and/or anorien.csc.warwick.ac.uk/mirrors/CTAN/info/fontsampler/… and see if there is something available which you like? This is probably going to be more productive than wishing you had fonts you don't! – cfr Mar 15 '14 at 0:33

You might also try the version that is available by using \mathcal{F} with \usepackage{F}. This give what is (in my opinion) a much more pleasing calligraphic script:

enter image description here



% eucal redefines \mathcal command but keeps original
% Computer Modern version available as \CMcal
$\CMcal{F}$ Original \verb!\mathcal{F}!

$\mathcal{F}$ \verb!\mathcal{F}! with \verb!eucal! 


For more info, see Are there two different versions of the \mathcal{F} character?.

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With a default TeX installation, for example, you could produce any of these (among other options):

4 Fs

with code something like this:

\DeclareMathAlphabet\mathcalligra   {T1}{calligra} {m} {n}
\DeclareMathAlphabet\mathzapf       {T1}{pzc} {mb} {it}
\DeclareMathAlphabet\mathchorus     {T1}{qzc} {m} {n}
\DeclareMathAlphabet\mathrsfso      {U}{rsfso}{m}{n}
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The dutchcal package makes the dutchcal fonts ready-to-use. They're derived from the esstix fonts, which are a times-like font, slightly reworked. If you're under MiKTeX, after installing them with MiKTeX Package Manager, as often you'll need to launch updmap in order to make the fonts completely available.


     $ \mathcal{F}\enspace  \mathbcal{F}$


enter image description here There is also a bickham package, but having the fonts really available to your TeX system is more involved, as Bickham is an opentype font, it has to be converted to type 1 with the LCDF Type Tools.

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