Quasiconvex function
= Quasiconvex function
{wiki=Quasiconvex_function}
A function \\( f: \\mathbb\{R\}^n \\to \\mathbb\{R\} \\) is called quasiconvex if, for any two points \\( x, y \\in \\mathbb\{R\}^n \\) and for any \\( \\lambda \\in \[0, 1\] \\), the following condition holds: \\\[ f(\\lambda x + (1 - \\lambda) y) \\leq \\max(f(x), f(y)).