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Subgraphs with E = 0
•H = R(x,y)     E = 2-2 = 0;  what is Pr(H) ?
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•H = R(x,y)R(u,v)     E = 4–4 = 0what is Pr(H) ?
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•H = R(x,y)R(y,z)R(z,x), R(u,v)  E(H) = E(triangle);
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•Exponent in the theorem is always correct, but need to adjust the coefficient