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The vertex set of a graph is simply a set of all vertices of the graph. The cardinality of the vertex set for a given graph g is known as the vertex count of g. The vertex ...

An operation that takes two vector bundles over a fixed space and produces a new vector bundle over the same space. If E_1 and E_2 are vector bundles over B, then the Whitney ...

An archaic name for topology.

The map which takes points on the surface of a sphere S^2 to their antipodal points.

A topological space X in which each subset of X of the "first category" has an empty interior. A topological space which is homeomorphic to a complete metric space is a Baire ...

A vector field u satisfying the vector identity ux(del xu)=0 where AxB is the cross product and del xA is the curl is said to be a Beltrami field.

A type I Markov move.

A diffeomorphism is a map between manifolds which is differentiable and has a differentiable inverse.

Each centered convex body of sufficiently high dimension has an "almost spherical" k-dimensional central section.

The geometry of Finsler space.