Hyperboloid

In mathematics, a hyperboloid is a quadric – a type of surface in three dimensions – described by the equation

or

Both of these surfaces asymptotically approach the same conical surface as x or y becomes large:

If and only if a = b, it is a hyperboloid of revolution, and is also called a circular hyperboloid.

单词	Elliptical hyperboloid
释义	Elliptical hyperboloid 英语百科 Hyperboloid In mathematics, a hyperboloid is a quadric – a type of surface in three dimensions – described by the equation or Both of these surfaces asymptotically approach the same conical surface as x or y becomes large: If and only if a = b, it is a hyperboloid of revolution, and is also called a circular hyperboloid.
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Elliptical hyperboloid