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quasi-order, pre-ordering, quasi-ordering

A reflexive and transitive binary relation on a set. If is a pre-order on a set , then the relation if and only if and , , is an equivalence on . The pre-order induces an order relation (cf. also Order (on a set)) on the quotient set .

How to Cite This Entry:
Pre-order. Encyclopedia of Mathematics. URL:
This article was adapted from an original article by T.S. Fofanova (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article