positive part

positive part

[′päz·əd·iv ‚pärt] (mathematics) For a real-valued function ƒ, this is the function, denoted ƒ+, for which ƒ+(x) = ƒ(x) if ƒ(x)≥0 and ƒ+(x) = 0 if ƒ(x) < 0.