# Discrete Math

posted by
**Confused!!** on
.

a) Show that the relation R on Z x Z defined by (a , b) R (c, d) if and only

if a + d = b + c is an equivalence relation.

b) Show that a subset of an anti symmetric relation is also anti symmetric.

c) Suppose that R is a symmetric relation on a set A. Is R also symmetric?

Thank you!!