Definition:Filtering Function/Warning

Filtering Function Also known as
The filtering function is also known as the interpolating function.

The filtering function $\map {\operatorname {sinc} } x$ is not the same as the real function $f$ defined as $\forall x \in \R: \map f x = \dfrac {\sin x} x$, which is depicted below:


 * Sine-of-x-over-x.png