Central symmetry from inversely homothetic sections
Central symmetry from inversely homothetic sections
Let , , be convex bodies with . Inversely homothetic sections conjecture. If, for every pair of parallel hyperplanes supporting , the sections and are inversely homothetic with respect to the point lying on the segment connecting the contact points of with and , then and are centrally symmetric with respect to the same point. The statement is presented as a parallel-section counterpart of the projective involution conjecture and remains open.
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Primary source
Bartłomiej Zawalski, “On flat shadow boundaries from point light sources and the characterization of ellipsoids”, arXiv:2603.29130 (2026).
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