Abstract
It is shown that if, for some 2≦j≦d-2, all thej-faces of ad-polytopeP are centrally symmetric, then all the faces ofP of every dimension are centrally symmetric.
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References
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B. Grünbaum,Convex Polytopes, John Wiley and Sons, London-New York-Sydney, 1967.
G. C. Shephard,Polytopes with centrally symmetric faces, Canad. J. Math.,19 (1967), 1206–1213.
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McMullen, P. Polytopes with centrally symmetric faces. Israel J. Math. 8, 194–196 (1970). https://doi.org/10.1007/BF02771315
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DOI: https://doi.org/10.1007/BF02771315