noun /təˈpɒləʤi,təˈpɑːləʤi/
a) A branch of mathematics studying those properties of a geometric figure or solid that are not changed by stretching, bending and similar homeomorphisms.
b) A collection τ of subsets of a set X such that the empty set and X are both members of τ and τ is closed under arbitrary unions and finite intersections.
Syn: analysis situs
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