Posted by **Confused!!** on Thursday, March 15, 2012 at 4:42pm.

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!!

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