[Tugindia] \buildrel error

[Navinraj]

Thanks Mr. Herbert

It is working, but when I am using
\usepackage{amsmath} \cases is not working. Is there
any other way to make both work?

Navin


--- Herbert Voss <Herbert.Voss at alumni.TU-Berlin.DE>
wrote:
> Navinraj schrieb:
> 
> > I used \stackrel{AB}{\Longleftrightarrow} for two
> > characters, When I use this for four characters
> (ABCD)
> > the \Longleftrightarrow is not expanding for
> > characters, then I used
> > \builtrel{ABCD}{\Longleftrightarrow}. but this is
> > giving error. Anybody can give solution for this.
> 
> maybe this helps
> 
> Herbert
> 
> \documentclass{article}
> \usepackage{amsmath}
> \makeatletter
> \newcommand{\xLongleftrightarrow}[2][]{%
>      \ext at arrow
> 0055{\Longleftrightarrowfill@}{#1}{#2}%
> }
>
\def\Longleftrightarrowfill@{\arrowfill@\Leftarrow\Relbar\Rightarrow}
> \makeatother
> \begin{document}
> 
> $\stackrel{ABCD}{\Longleftrightarrow}$
> $\xLongleftrightarrow{ABCD}$
> $\xLongleftrightarrow[ABCD]{}$
> $\xLongleftrightarrow[ABCD]{ABCD}$
> 
> \end{document}
> 
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