证明了如果两个凸体被过原点的任何一个超平面所截得到的截面具有相等的平均弦长和相同的对偶Steiner点,则这两个凸体是重合的,并且得到此定理的一个的稳定性版本.
If two convex bodies have the property that their intersections by any hyperplane through the origin have the same average chord length and the same dual Steiner point, then the two bodies are identical. This result is proved in a stronger stability version.