Naredni sastanak Seminara biće održan u petak, 25. oktobra 2024. godine, u sali 301f Matematičkog instituta SANU sa poečetkom u 14.15.
Predavač: Margaret Bayer, University of Kansas
Naslov predavanja: GRAPHS AND RECONSTRUCTION OF POLYTOPES
Apstrakt: How much combinatorial information is needed to determine the face lattice of a convex polytope? The talk will survey results on this question. An old result by Blind and Mani, and Kalai, shows that the graph of a simple d-polytope determines the combinatorial type of the d-polytope. More recent work of Doolittle, et al., extends the result on simple polytopes to polytopes with few nonsimple vertices. The d/2-skeleton of a simplicial d-polytope determines the combinatorial type of the polytope (Perles), and this has been extended (by Dancis) to simplicial manifolds. Also considered will be the question of dimensional ambiguity: when is a k-complex the k-skeleton of polytope of different dimensions. In particular, results by Espenschied on the graphs of cross-polytopes will be discussed.
Napomena: Predavanja se mogu pratiti na daljinu preko linka:
https://miteam.mi.sanu.ac.rs/call/XZawgjASPavABY37A/2t2yGBvU01onPAP3aSUKiNFb2Skjk-3w5XJruW-yaZh
Registraciona forma je dostupna na:
https://miteam.mi.sanu.ac.rs/asset/sd3bebvvcBSNtN78B
