Piecewise linear may refer to: Piecewise linear curve, a connected sequence of line segments Piecewise linear function, a function whose domain can be decomposed into pieces on which the function is linear Piecewise linear manifold, a topological space formed by gluing together flat spaces Piecewise linear homeomorphism, a topological equivalence between two piecewise linear manifolds Piecewise linear cobordism, a cohomology theory Piecewise linear continuation, a method for approximating functions by piecewise linear functions