[texhax] Calligraphic font in equation environment

[Konstantin Karapetyan]

>  	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
\mathcal{F}[f(x)].

HT,

Konstantin.