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Wiktionary

supermodular

a. (context mathematics said of a function English) having the property that $f(x\; lor\; y)\; +\; f(x\; land\; y)\; geq\; f(x)\; +\; f(y)$ for all ''x'', ''y'' $isin$ ''R''^''k'', where ''x'' $vee$ ''y'' denotes the componentwise maximum and ''x'' $wedge$ ''y'' the componentwise minimum of ''x'' and ''y''.