It makes problems also in the standard article class - maybe the cause
is in the amsmath package...
tex file:
=========
\documentclass[english]{article}
\usepackage[T1]{fontenc}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{bm}
\usepackage{babel}
\begin{document}
$\bm {\hat{\tau }}$
\end{document}
error message:
==============
! Undefined control sequence.
\mathaccentV #1#2#3#4#5->\ifmmode \gdef \macc@tmp
{\macc@depth \@ne
}\setbox...
l.9 $\bm {\hat{\tau }}
$
?
! Emergency stop.
\mathaccentV #1#2#3#4#5->\ifmmode \gdef \macc@tmp
{\macc@depth \@ne
}\setbox...
l.9 $\bm {\hat{\tau }}
$
===========
putting another pair of {} solves this problem
$\bm {{\hat{\tau }}}$
Herbert Voss wrote:
> Jan Sykora wrote:
>
>> Lyx 1.2.0 strips double {{ }} into a single {} in math mode. This is
>> necessary to be used with IEEEtran class and constructions like
>> \bm{{\hat{\xi}}}.
>
>
>
> I can not see any difference between
> \bm{{\hat{\xi}}} and \bm{\hat{\xi}}
> in IEEEtran.cls, too.
>
> Herbert
>
>
>
>
--
Jan Sykora
Czech Technical University of Prague
Faculty of Electrical Engineering
K337 Department of Radioelectronics
Technicka 2
166 27 Praha 6
Czech Republic
E-mail: [EMAIL PROTECTED]
http://radio.feld.cvut.cz/~sykora/
tel: +420 2 2435 3921
fax: +420 2 2435 5829
