Maximum of the set {f(x):x∈S}\left\{ f(x) : x \in S \right\}{f(x):x∈S}. The result is Undefined\operatorname{Undefined}Undefined if the set does not have a mimumum value.
Maximum of the set {f(x):x∈S and P(x)}\left\{ f(x) : x \in S \,\mathbin{\operatorname{and}}\, P(x) \right\}{f(x):x∈SandP(x)}.