In
mathematics, a
paraboloid is a
quadric, a type of surface in three dimensions, described by the equation:
- <math>
\left( \frac{x}{a} \right) ^2 + \left( \frac{y}{b} \right) ^2 + 2z = 0
</math> (elliptic paraboloid),
or
- <math>
\left( \frac{x}{a} \right) ^2 - \left( \frac{y}{b} \right) ^2 + 2z = 0
</math> (hyperbolic paraboloid).