Videolibrary
RUS  ENG    JOURNALS   PEOPLE   ORGANISATIONS   CONFERENCES   SEMINARS   VIDEO LIBRARY   PACKAGE AMSBIB  
Video Library
Archive
Most viewed videos

Search
RSS
New in collection






International Seminar for Young Researchers "Algebraic, Combinatorial and Toric Topology"
December 17, 2020 13:35–14:15, online
 


A combinatorial formula for the first Pontryagin class in terms of combinatorial curvature redistribution

D. A. Gorodkov
Video records:
MP4 180.7 Mb

Number of views:
This page:61
Video files:25


Видео не загружается в Ваш браузер:
  1. Проверьте с Вашим администратором, что из Вашей сети разрешены исходящие соединения на порт 8080
  2. Сообщите администратору портала о данной ошибке

Abstract: The problem of finding explicit formulae for the rational Pontryagin classes of a combinatorial manifold is classical in algebraic topology. In the case of the first Pontryagin class Prof. Alexander Gaifullin devised a computable explicit algorithm in 2004. More precisely, he described the set of all local formulae for the first Pontryagin class of a combinatorial manifold, and, therefore, it is natural to look for a canonical precise formula from this set. We will demonstrate such a choice based on the redistribution of combinatorial curvature under bistellar flips of two-dimensional spheres. The talk is based on a joint work with Prof. Alexander Gaifullin.

Language: English

SHARE: VKontakte.ru FaceBook Twitter Mail.ru Livejournal Memori.ru
 
Contact us:
 Terms of Use  Registration to the website  Logotypes © Steklov Mathematical Institute RAS, 2021