fan function

The **fan function** is a mathematical concept that typically refers to a type of piecewise function defined on sectors or “fans” of the coordinate plane, often used in geometry, combinatorics, and optimization. In various contexts, fan functions help describe or analyze structures related to fan-shaped domains, such as in toric geometry or vector arrangements.

Use this tag for posts discussing the definition, properties, applications, or examples of fan functions in mathematics, as well as any related computational methods or theoretical insights.