# Concept derivation guides

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Concept guide



## [Exact boundary comparison with the complement](/en/derivations/derivation-mko-topological-boundary-01/?from=%2Fen%2Fderivations%2F%3Fq%3Dmko-topological-boundary)

Compute the boundaries of A={b} and its complement in a chain topology.

Topological boundary

derivation-mko-topological-boundary-01





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