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Join (topology)

In topology, a field of mathematics, the join of two topological spaces A {\displaystyle A} and B {\displaystyle B} , often denoted by A ∗ B {\displaystyle A\ast B} or A ⋆ B {\displaystyle A\star B} , is a topological space formed by taking the disjoint union of the two spaces, and attaching line segments joining every point in A {\displaystyle A} to…

Geometric sets, Properties & Topological spaces