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Equivalence relation

<mathematics> A relation R on a set including elements a, b, c, which is reflexive (a R a), symmetric (a R b => b R a) and transitive (a R b R c => a R c).

An equivalence relation defines an equivalence class.

See also partial equivalence relation.

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equational logic Equel equivalence class equivalence class partitioning equivalence partitioning	equivalence class equivalence relation partial equivalence relation PER real number	ER er ERA era Erasable Programmable Read-Only Memory