If a relation RRR is symmetric and anti-symmetric, what can be said about RRR?
Rsubset(x,x):xinAR \\subset \\{(x, x) : x \\in A\\}Rsubset(x,x):xinA
RRR is empty
RRR is an equivalence relation
R=AtimesAR = A \\times AR=AtimesA