👉 A foliation is a mathematical concept in topology that describes the topology of an abstract manifold, or more generally, of any topological space. It is used to describe how different submanifolds (or subspaces) interact with each other and within themselves. In its most general form, a foliation on a smooth manifold M is a collection of open sets F in M such that for every point x in the manifold there exists an open set U containing x such that the closure of U contains
