recession cone中文什么意思

回收锥

• recession:    n. (占领地等的)交还。
• cone:    n. 1.圆锥，锥形物；锥面；锥体。 ...
• be in a recession:    处于衰退之中

百科释义

In mathematics, especially convex analysis, the recession cone of a set A is a cone containing all vectors such that A recedes in that direction. That is, the set extends outward in all the directions given by the recession cone.