Question

what u mean by equivalence relation

Answer 1

Equivalence relations are a ready source of examples or counterexamples. ... Reflexive and transitive: The relation ≤ on N. Or any preorder; Symmetric and transitive: The relation R on N, defined as aRb ↔ ab ≠ 0.

Answer 2

here you go with ur answer
Equivalence relations are a ready source of examples or counterexamples. ... Symmetric and transitive: The relation R on N, defined as a Rb ↔ ab ≠ 0. Or any partial equivalence relation; Reflexive and symmetric: The Relation R on Z, defined as a Rb ↔ "a − b is divisible by at least one of 2 or 3.
I hope it helps