A hyperbolic paraboloid.
Originally uploaded to the English Wikipedia:
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Ido | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +/-
الصفحات التالية تحتوي على وصلة لهذه الصورة: