[texhax] Calligraphic font in equation environment

Konstantin Karapetyan texnic at photonica.ru
Wed Apr 13 06:41:26 CEST 2005

>  	Is the calligraphic style to be used in some special way in the
> equation environment? The following does not work, the stuff after the
> \cal{F} doesn't show up properly.

> \begin{equation}
> F(u) = |F(u)| \exp [i \psi (u)] = \cal{F} [f(x)]
> \end{equation}

That's command vs. declaration difference. Use either {\cal F}[f(x)] or



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