对于一般的非凸函数，其方向导数不具备任何凸性，可以利用一般正齐次函数的回收函数来给出它的一个上凸近似。

We research on describing preinvexity of functions in this paper by means of the density and weakly near convexity in the set.

youdao

对于一般的非凸函数，其方向导数不具备任何凸性，可以利用一般正齐次函数的回收函数来给出它的一个上凸近似。

We research on describing preinvexity of functions in this paper by means of the density and weakly near convexity in the set.

youdao