Quasiconvex function

（重定向自Quasiconvexity）

A function that is not quasiconvex: the set of points in the domain of the function for which the function values are below the dashed red line is the union of the two red intervals, which is not a convex set.

The probability density function of the normal distribution is quasiconcave but not concave.

A quasilinear function is both quasiconvex and quasiconcave.

In mathematics, a quasiconvex function is a real-valued function defined on an interval or on a convex subset of a real vector space such that the inverse image of any set of the form $(-\infty,a)$ is a convex set. Informally, along any stretch of the curve the highest point is one of the endpoints. The negative of a quasiconvex function is said to be quasiconcave.

单词	quasiconvexity
释义	quasiconvexity 英汉-汉英词典拟凸性词组 \| 习惯用语您要查找的是不是： significantly adv. 意味深长地值得注目地 quasi-convexity 拟凸性 conventionality n. 照惯例;习俗;因循性;恪守常规 planoconvex adj. 一面平一面凸的(平凸的) quasiconvexity [数] 拟凸性英语百科 Quasiconvex function （重定向自Quasiconvexity） In mathematics, a quasiconvex function is a real-valued function defined on an interval or on a convex subset of a real vector space such that the inverse image of any set of the form $(-\infty,a)$ is a convex set. Informally, along any stretch of the curve the highest point is one of the endpoints. The negative of a quasiconvex function is said to be quasiconcave.
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quasiconvexity

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Quasiconvex function