Total functions are used to map every element of one set to another set.

Gabor functions are widely used in image processing.

Sigmoid functions are commonly used in machine learning algorithms.

Bent functions are widely used in cryptography.

The Walsh functions are widely used in signal processing.

Divisor functions are important in number theory.

Baire functions are important in the study of real analysis.

Forcing functions are powerful tools for driving change and achieving goals.

Window functions are powerful tools in data analysis.

Gaussian functions are commonly used in signal processing.