[pstricks] Is this paraboloid possible with PSTricks

[Hendri Adriaens]

> Is it possible to do with PSTricks a paraboloid like the one shown at:
> 
> http://mathworld.wolfram.com/Paraboloid.html
> 
> but _without_ the grid? If so, which packages should I consider?

pst-3dplot, see www.pstricks.de

-Hendri.