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Barcelona Algebraic Topology Group

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Thomas Poguntke Memorial Workshop

Thomas Poguntke passed away on September 24, 2018, after a serious illness, just a few weeks after arriving in Barcelona. He was 28 years old and about to hand in his PhD thesis (University of Bonn) on higher Segal spaces, K-theory and Hall algebras.

This workshop is dedicated to his memory and to his mathematics, which will live on.
31 January-1 February, 2019, CRM


Tobias Dyckerhoff
Imma Gálvez-Carrillo
Gustavo Jasso
Joachim Kock
Mark Penney
Claudia Scheimbauer
Walker Stern
Tashi Walde
Mathew Young

See for more information.

Advanced lectures in Homotopy theory 2017: Discrete Morse Theory

From 24th to 26th of April 2017, a series of lectures will be given by two speakers to give an exposition of discrete Morse theory.

The lectures will take place in in the seminar room C3b of the department.

Antonio Díaz (Universidad de Málaga):
Lecture 1: Differentiable Morse theory. Applications to spheres and the classification of surfaces.
Lecture 2: PL Morse theory. Application to a theorem of Solomon-Tits.
Lecture 3: Algebraic discrete Morse theory. Application to the p-subgroups complex.

José Antonio Vilches (Universidad de Sevilla):
Lecture 1: Basic notions of discrete Morse theory: discrete Morse functions, critical simplices, vector fileds, Morse inequalities, and cancellation of critical simplices.
Lecture 2: Discrete Lyapunov functions,  comparison between discrete and differentiable  Morse theory. Morse theory via graphs with Hasse diagrams.
Lecture 3: Discrete Morse theory in graphs, in non-compact complexes, perfect discrete Morse functions.


Monday 24th
15:30-16:30 Díaz
16:50-17:50 Vilches

Tuesday 25th
11:10-12:10 Vilches
12:30-13:30 Díaz

Wednesday 26th
10:00-11:00 Vilches
11:30-12:30 Díaz

Organizer: Natàlia Castellana

Combinatorics and Homotopy Day

Combinatorics and Homotopy Day

CRM, Bellaterra, 10 February 2017.

This is the programme for the Combinatorics and Homotopy Day hosted by the Grup de Topologia Algebraica de Barcelona held at the Centre de Recerca Matematica, in the campus of Universitat Autonòma de Barcelona, Bellaterra on Friday 10th February 2017.

 Mara Ofelia Ronco (Instituto de Fsica y Matematicas, Universidad de Talca)
 Andrew Tonks (Department of Mathematics, University of Leicester)
 Mark Weber (Czech Academy of Sciences)

Friday 10 February 2017, CRM, Aula Petita, C1/028
 10:30 - 11:30 Andrew Tonks, 'Restriction species'
 11:00 - 11:30 Co ffee break.
 12:00 - 13:00 Mara Ofelia Ronco. 'Algebraic structures on the faces of graph associahedra'
 13:00 - 15:00 Lunch at Restaurant Buff et de Ciencies, UAB
 15:00 - 16:00 Mark Weber, 'Operads as polynomial 2-monads'

The abstracts are avalilable in the Friday's Seminar Section.

 Imma Galvez Carrillo (Departament de Matematiques, Universitat Politecnica de Catalunya)
 Joachim Kock (Departament de Matematiques, Universitat Autonoma de Barcelona)

Supporting Grants
 MTM2016-80439-P, Teora de homotopa de estructuras algebraicas, MINECO-FEDER
 MTM2016-76453-C2-2-P, Topologa algebraica y de baja dimension, MINECO
 MTM2015-69135-P, Geometra y topologa de variedades, algebra y aplicaciones, MINECO-FEDER

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