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Article | REF: AF94 V1

Ordered Set Theory

Author: Jean-Charles PINOLI

Publication date: August 10, 2019, Review date: May 7, 2021

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1. Binary relationships

1.1 Relationships and inverse relationships

Definition ((binary) relation). A (binary) relation ((binary) relation) between a set E and a non-empty set F, or from E to F, is a subset of the Cartesian product E × F. The notation for an element x of E in relation to an element y of E via the relation is then (p. 18 of

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