# Concept derivation guides

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Concept guide



## [Binary relations: computing the domain, images and the converse step by step](/en/derivations/derivation-mko-relation-01/?from=%2Fen%2Fderivations%2F%3Fq%3Dmko-relation)

Let A={1,2,3,4}, B={2,3,4,5,6}, R={(1,2),(1,3),(3,3),(4,6)} and C={1,3}. Check R⊆A×B; compute Dom(R), R[C], R[∅], R⁻¹ and Dom(R⁻¹); decide whether R is a function A→B and whether R⁻¹ is a function B→A.

Binary relations and set projections

derivation-mko-relation-01





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