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Characterizations of balls by sections and caps. (English) Zbl 1330.52013

The main result of this paper shows that if a convex body and a ball have equal constant volume of caps and equal constant areas of sections with respect to the supporting planes of a sphere, then the convex body is identical to the ball.

MSC:

52A40 Inequalities and extremum problems involving convexity in convex geometry
52A38 Length, area, volume and convex sets (aspects of convex geometry)

References:

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[11] Wikipedia: Beta function. http://en.wikipedia.org/wiki/Beta_function
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