Using a new definition W(P), one can get the result of an origin-symmetric convex body as that of an origin-symmetric polytope, which is already known, and get the extreme value of the ratio.

• 借助定义一个新的中心仿射不变量W(P)把已有结论中的研究对象从中心对称凸多胞形，推广到一般中心对称凸体，并求得推广后的极值。