On a characteristic property of the sphere

Horst Kramer

Abstract


We are studying a characteristic property of the disc in the Euclidean plane ℝ2 with the help of an intersection property of the semicircles with end-points in the boundary of the disc and a characteristic property of the ball in the Euclidean space ℝ3.

Keywords


Balls and Spheres; Smooth Strictly Convex Sets

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DOI: http://dx.doi.org/10.1478/AAPP.96S2A8

Copyright (c) 2018 Horst Kramer

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