Properties of relations: given a relation r on a set a:
reflexive - r is reflexive iff xrx f...
Mathematics, 13.07.2019 19:20 kyrajewell2016
Properties of relations: given a relation r on a set a:
reflexive - r is reflexive iff xrx for every x in a r is reflexive iff (x, x) ο r for every x in a
symmetric β r is symmetric iff xry β yrx r is symmetric iff (x, y) οr β (y, x) ο r
antisymmetric β r is antisymmetric iff xry β y x or x = y r is antisymmetric iff (x, y) ο r β (y, x) οr or x = y
transitive β r is transitive iff xry and yrz β xrz r is transitive iff (x, y) οr and (y, z) οr β (x, z) οr
prove or disprove each of the properties for the given relation.
4) a = {integers} r = { (x, y) | y β₯ 2x }
reflexive?
symmetric?
antisymmetric?
transitive?
Answers: 2
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