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Paraboloid eliptic 1

Paraboloid eliptic

$ (P_E): \; z= \frac {x^2}{a^2} + \frac {y^2}{b^2}, \; (a, b >0), \; (x, y) \in \mathbb R^2. \! $


Paraboloid hiperbolic 1

Paraboloid hiperbolic

$ (P_H): \; \begin{cases} x=au \cosh v, \\ y=bu \sinh v, \\ z=u^2. \end{cases} (u,v) \in \mathbb R^2. \! $

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