convex function in the sense of Jensen

convex function in the sense of Jensen

[¦kän‚veks ¦fəŋk·shən inthə ‚sens əv ′jen·sən]
(mathematics)
A function ƒ(x) over an interval a, b such that, for any two points x1 and x2 satisfying a <>x1<>x2<>b, ƒ[(x1+ x2)/2] ≤ (1/2).[ƒ(x1) + ƒ(x2)].