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Barcelona Algebraic Topology Group

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Barcelona Algebraic Topology Group
Friday's Topology Seminar 2016-2017 PDF Print E-mail

Title : Random thoughts on modular reflection groups and Kac-Moody groups
Speaker
: Jaume Aguadé
Place: Seminari C3b
Date: 5th May at 12:00.
Abstract : While looking for a large family of Kac-Moody groups K such that the cohomology of BK is accessible to computations, we (Albert Ruiz and me) were learning about reflection groups in prime characteristic. These attemps to compute the cohomology of BK are used as an excuse to talk about modular reflection groups.

Title : Variedades de conjugación y pureza homológica.
Speaker: Wolfgang Pitsch
Place: Seminari C3b
Date: 12th May at 12:00.
Abstract :En esta charla explicaremos el rsultado siguiente debido principalmente a N. Ricka.
Teorema: Una variedad X es de conjugación si y sólo si es homológicamente pura.
Recordemos que una variedad de conjugación es un variedad con una involución en la cual la subvariedad de puntos fijos se comporta homológicamente como la variedad ambiente, salvo por una divisón por 2 de los grados cohomológicos. La pureza homológica es una noción ligada a la estructura de la cohomología equivariante "a la Mackey" y será explicada durante la charla. Esto es un trabajo en colaboración con N. Ricka y J. Scherer

Title : Ascent for stratifications
Speaker: Natàlia Castellana
Place: Seminari C3b
Date: 19th May at 12:00.

Title : TBA
Speaker: Joachim Kock
Place: Seminari C3b
Date: 26th May at 11:30.

Title : TBA
Speaker: Ricard Riba
Place: Seminari C3b
Date: 2nd June at 11:30.

Title : TBA
Speaker: Louis Carlier
Place: Seminari C3b
Date: 2nd June at 12:15.

See the calendar for upcoming events.

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Presentation

This is the web site of the Algebraic Topology Team in Barcelona (Grup de Topologia Algebraica de Barcelona, 2014SGR-42 and Homotopy theory of algebraic structures, MTM2016-80439-P).

Our research interests include a variety of subjects in algebraic topology, group theory, homological algebra, and category theory. Here you will find information about us and our common activities.

 

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