Topkis's Theorem
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Topkis's Theorem states that if f is supermodular in (x,θ), and D is a lattice, then
is nondecreasing in θ. This can be very useful when f is not differentiable. It is rumored that Paul Ma, Stanford student and president of the Topkis fan club, is trying to generalize Topkis' theorem to J-holomorphic spaces.

