报告题目：SYMMETRIC POLYTOPES WHOSE AUTOMORPHISM GROUPS ARE 2-GROUP（2）

 报告时间：2025年12月12日下午16:00 -18:00

 报告地点：北区4号教学楼208报告厅

 报告摘要：The present work investigates regular, semiregular, and chiral polytopes of any rank d ≥ 3, whose automorphism groups are 2-groups. There is a large variety of rather small finite regular or alternating semiregular polytopes with automorphism groups of 2 power order: for such polytopes with toroidal sections of rank 3, the various sections of rank 3 can be entirely prescribed (possibly with one exception in the semiregular case). It is also shown that having a 2-group as automorphism group is hereditary under taking universal extensions: the universal extension of a given regular, chiral, or alternating semiregular polytope with a finite or infinite 2-group as automorphism group, is a polytope of one rank higher with an infinite 2-group an automorphism group.

 报告人简介：Egon Schulte，美国Northeastern University教授，Egon教授是多面体方面国际顶尖专家。截止2024年初共发表高水平科研文章97篇，其中多数发表在相关领域顶级期刊上，如组合领域顶级刊物JCTA上6篇，离散几何顶级期刊DCG上8篇，几何领域顶级期刊Adv. Geom两篇等，另外发表在著名综合类刊物Trans. Amer. Math. Soc.上4篇，Proc. London Math. Soc.上2篇，Adv. Math.上4篇。Egon教授在多个方向上获得了杰出成果，如凸多面体，离散几何，群论等。

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