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Abstract
The purpose of this paper is to follow the spirit of the Chakerian-Klamkin's characterization of central symmetry to give characterizations of projective centers and hyperplanes of symmetry. We use them to give a new and unexpected characterization of ellipsoids. We also prove two geometric colored theorems in the spirit of Lovász-Bárány
Author information
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JJ
Jesus Jerónimo-Castro
Inst. de Matemáticas - UNAM, Ciudad de México, Facultad de Matemáticas - UAG, Acapulco, México