Try http://mathworld.wolfram.com/topics/Surfaces.html

It's quite good, and also offers some kewl Java-applets.

Simen.

Tom Melly skrev i meldingen <391c20e0@news.povray.org>...
>I'm looking for 3d functions and images of the results of those functions -
>anyone know a good link?
>
>The sort of thing I'm after is z = x^2 + y^2
>
>

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