[texhax] LaTeX help

[Prof. Sudhir R. Ghorpade]

Dear Robin,

Thanks for your kind reply. Your remarks (isn't forbidden ...)
provided the clues I needed. I just added a simpler title for
the sake of List of Figures:
 \caption[Simpler Title]{The same complicated stuff with array}
and there isn't a problem any more. 

It seems to me that this is a better option than using \protect
etc. as advised in the FAQ.

Thanks again,

Sudhir

On Tue, 5 Aug 2003, Robin Fairbairns wrote:

> messages to support at tug.org are automatically forwarded to texhax; see
> details in the footer copy i've retained for your benefit.
> 
> > In my LaTeX file I have inserted a figure within the 
> > \begin{figure} ....   \end{figure}
> > and using the command \includegraphics to include my EPS file(s).
> > I tried to give the following caption:
> > --------------------------------------------------------------------
> >  \caption{Graphs of (i) $f(x):= |x|$ and 
> > (ii) $f(x):= \left\{ \begin{array}{ll} x + 2 & \mbox{ if} \ x \le 1, \\
> >                    x^2 - 1 & \mbox{ if} \ x > 1; \end{array} \right.$}
> > --------------------------------------------------------------------
> > However, while compiling, I get the following error message:
> >  --------------------------------------------------------------------
> > Argument of \@caption has an extra }.
> > <inserted text>
> >                 \par
> > l.1404 ...mbox{ if} \ x > 1; \end{array} \right.$}
> > --------------------------------------------------------------------
> > I know for sure that there is no extra brace.
> 
> there's an answer in the faq about precisely the error message you
> have.  in your case, the fragile command is \begin ==> use
> \protect\begin instead.
> 
> > Nevertheless it is annoying to have this error message. Can you tell
> > me how to avoid it? Could it be because the array environment (and the
> > \\ comand to go to next line) is forbidden within \caption?
> 
> \\ isn't forbidden, it just doesn't work: the nearest to "forbidding"
> \\ is the failure to do anything to make it work.  what should it do
> in the list of figures, for example.
> 
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