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A type of flow technically defined in terms of the tangent bundle of a manifold.

The boundary of complex hyperbolic 2-space.

A space having dimension n>3.

The problem of deciding if two knots in three-space are equivalent such that one can be continuously deformed into another.

A locally finite space is one for which every point of a given space has a neighborhood that meets only finitely many elements of any cover.

Topological lower bounds in terms of Betti numbers for the number of critical points form a smooth function on a smooth manifold.

A vector space possessing a norm.

A smooth manifold with a Poisson bracket defined on its function space.

An n-manifold which cannot be "nontrivially" decomposed into other n-manifolds.

The measurable space (S^',S^') into which a random variable from a probability space is a measurable function.