Quasi-convex (function)

Definition

u is quasi-convex means the lower contour is strictly convex.

Or if is convex for all

Or for , :

strictly quasi-convex

f is strictly quasi-concave if strict inequality holds for λ in (0, 1) and

A quasi-convex function CANNOT be "Inverse U" shape.

See also

• quasi-concave

Note

Example