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Pfeifle, Julián
2002Publication
In 1988, Kalai 5 extended a construction of Billera and Lee to produce many triangulated(d−1)-spheres. In fact, in view of upper bounds on the number of simplicial d-polytopes by Goodman and Pollack 2, 3, he derived that for every dimension d ≥ 5, most of these(d − 1)-spheres are not polytopal. However, for d = 4, this reasoning fails. We can now show that, as already conjectured by Kalai, all of his 3-spheres are in fact polytopal. We also give a shorter proof for Hebble and Lee’s result 4 that the dual graphs of these 4-polytopes are Hamiltonian.
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in: SICRIS
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