supermodular

Adjective

 * 1)  having the property that $$f(x \lor y) + f(x \land y) \geq f(x) + f(y)$$ for all x, y $$\isin $$ Rk, where x $$\vee$$ y denotes the componentwise maximum and x $$\wedge$$ y the componentwise minimum of x and y.