(mathematics) Equal to a sum of finitely many linear functions, each defined on a convex polytope: said of functions between vector spaces

In mathematics, a piecewise function (also called a piecewise-defined function, a hybrid function, or a function defined by cases) is a function whose domain is partitioned into several intervals ("subdomains") on which the function may be defined differently.

In mathematics, a piecewise linear or segmented function is a real-valued function of a real variable, whose graph is composed of straight-line segments.

In mathematics, a piecewise linear manifold (PL manifold) is a topological manifold together with a piecewise linear structure on it.