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mathematics
Entity
International Standard Book Number
Entity
set theory
Entity
topology
Entity
set
Entity
OCLC, Inc.
Entity
subset
Entity
interval
Entity
topological space
Entity
finite set
Entity
countable set
Entity
open set
Entity
transitive relation
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neighborhood
Entity
partition of a set
Entity
compact space
Entity
reflexive relation
Entity
simplex
Entity
Encyclopedia of Mathematics
Entity
indexed family
Entity