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10 Cards in this Set

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relation

subset of AxB. if (a,b) is an element than a related to b

inverse

all (b,a) for which (a,b) was part of the relation

domain

set of all elements of A that are related to some element in B

range

set of all elements in B that have some A element related to them

reflexive

if x~x for all x in A

symmetric

if x~y, then y~x

transitive

if x~y and y~z then x~z

partition

collection of sets, pairwise disjoint, that comprise an entire set A

equivalence class

any a in A [a] consists of all elements related to a

function

sebset of AxB s.t for every a there exists a unique b. f(a)=b