# Special Functions library

## (Sinus Cardinal and Hyperbolic Sinus Cardinal functions)

The Sinus Cardinal family of functions (indexed by the family of indices ) is defined by ; it sees heavy use in signal processing tasks.

By analogy, the Hyperbolic Sinus Cardinal family of functions (also indexed by the family of indices ) is defined by .

These two families of functions are composed of entire functions.

`Sinus Cardinal of index pi (purple) and Hyperbolic Sinus Cardinal of index pi (red) on R`

Revised 18 Aug 2004

© Copyright Hubert Holin 2001-2004. Permission to copy, use, modify, sell and distribute this document is granted provided this copyright notice appears in all copies. This software is provided "as is" without express or implied warranty, and with no claim as to its suitability for any purpose.