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Sinus Cardinal and Hyperbolic Sinus Cardinal Functions Overview

The Sinus Cardinal family of functions (indexed by the family of indices a > 0) 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 a > 0) is defined by .

These two families of functions are composed of entire functions.

These functions (sinc_pi and sinhc_pi) are needed by our implementation of quaternions and octonions.

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

sinc_pi_and_sinhc_pi_on_r


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