[pstricks] Curve

[Herbert Voss]

christophe Poulain wrote:

> When I have
> 
>  A   B
> ---=---
>  C   D
> 
> I would like drawing a curve who do the path C-B-A-D (with a arrow when
> she arrive to D)
> 
> How I make that ?

\documentclass[12pt]{article}
\usepackage{pstricks}
\usepackage{pst-node}
\SpecialCoor

\begin{document}

\Huge
\[
\frac{\rnode{A}{A}}{\rnode{C}{C}} = \frac{\rnode{B}{B}}{\rnode{D}{D}}
\]
\pscurve{->}([nodesep=0.1]C)(B)(A)([nodesep=-0.75]D)

\end{document}


Herbert


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