|Definition of surface, in parametric
x(u,v) = cos(á) sinh(v) sin(u) + sin(á)
Note: The values ð/2 and 3ð/2 for á result in a catenoid (a 2-D rendering of which is produced when we hold a flexible string, or chain, from its two ends, and keep it loose). All other values for á result in a helicoid.
Weisstein, Eric W. CRC Concise Encyclopedia of Mathematics, pp. 205-206
Note: If you do not see Greek characters on this page, it is probably because the font you are currently using with your browser does not include the Greek set. To help you decipher this page, á is alpha, and ð is pi.
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