讨论了椭圆及其内接、外切n边形的仿射等价问题，给出了椭圆及其内接、外切n边形与圆及其内接、外切正n边形仿射等价的必要条件和充......

The volume of a cone is one third of the volume of a cylinder if they share same base and equal height. Let’s propose a......

We give a characterization of the boundaries of smooth strictly convex sets in the Euclidean plane R2?based on the exist......