1. Convex functionIn mathematics, a real-valued function defined on an interval is called convex (or convex downward or concave upward) if the graph of the function lies below the line segment joining any two points of the graph. Equivalently, a function is convex if its epigraph (the set of points on or above the graph of the function) is a convex set. More generally, this definition of convex functions makes sense for functions defined on a convex subset of any vector space.
Read “Convex function” on English Wikipedia
Read “凸関数” on Japanese Wikipedia
Read “Convex function” on DBpedia
Read “Convex function” on English Wikipedia
Read “凸関数” on Japanese Wikipedia
Read “Convex function” on DBpedia
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