# Concept derivation guides

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Concept guide



## [Closure and interior in a three-point chain topology](/en/derivations/derivation-mko-closure-and-interior-01/?from=%2Fen%2Fderivations%2F%3Fq%3Dmko-closure-and-interior)

Find the closure and interior of A={b}.

Topological closure and interior

derivation-mko-closure-and-interior-01





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