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The set closure St^_v of a star Stv at a vertex v of a simplicial complex K.

A list of problems in low-dimensional topology maintained by Kirby (1995). The list currently runs about 380 pages.

A space X is locally pathwise-connected if for every neighborhood around every point in X, there is a smaller, pathwise-connected neighborhood.

The set St^_v-Stv, where St^_v is a closed star and Stv is a star, is called the link of v in a simplicial complex K and is denoted Lkv (Munkres 1993, p. 11).

The term cube is used in topology to denote the Cartesian product of any (finite or infinite) number of copies of the closed interval [0,1] equipped with the product topology ...

Bowling, known as "ten pins" throughout most of the world, is a game played by rolling a heavy ball down a long narrow track and attempting to knock down ten pins arranged in ...

The direct limit of the cohomology groups with coefficients in an Abelian group of certain coverings of a topological space.

Distinguish between smooth manifolds in four dimensions.

A topological space in which every point has a countable neighborhood system base for its neighborhood system.

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