A Geometric Lower Bound Theorem |
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| Authors: | Karim Adiprasito Eran Nevo José Alejandro Samper |
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| Institution: | 1.Einstein Institute of Mathematics,The Hebrew University of Jerusalem,Jerusalem,Israel;2.Department of Mathematics,University of Washington,Seattle,USA |
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| Abstract: | We resolve a conjecture of Kalai relating approximation theory of convex bodies by simplicial polytopes to the face numbers and primitive Betti numbers of these polytopes and their toric varieties. The proof uses higher notions of chordality. Further, for C 2-convex bodies, asymptotically tight lower bounds on the g-numbers of the approximating polytopes are given, in terms of their Hausdorff distance from the convex body. |
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