Three Talks in Combinatorics

Every once in a while we gather three researchers and let them give about 30-minute-talks in combinatorics.
The event takes place at Edifici històric of Universitat de Barcelona. The room differs from time to time.
To see the abstracts hover over the titles.

upcoming

Tuesday, November 26th 2024, room iA (ground floor edifici històric mathemàtiques)

11:00	Miguel Ángel Fiol Mora	Universitat Politècnica de Catalunya	On the Shannon capacity of graph powers and its application
11:40	Aida Abiad	Eindhoven University of Technology	Eigenvalue bounds for the independence number of graph powers and an application to coding theory
12:20	Amanda Montejano	Universidad Nacional Autónoma de México	Feasible edge-replacements and the family of amoebas

past

Tuesday, July 9th 2024, room iA (ground floor edifici històric mathemàtiques)

11:00	Leonardo Martínez-Sandoval	Universidad Nacional Autónoma de México	A Hall-type theorem for points in general position
11:40	César D. Alejandrez	Universidad Nacional Autónoma de México	Rainbow colorations in projective planes
12:20	Juan Carlos García Altamirano	Universidad Autónoma Metropolitana	Los digrafos 3 y 4-dicromáticos, con un número fijo de arcos simétricos, de orden mínimo

Thursday, May 23rd 2024, room iA (ground floor edifici històric mathemàtiques)

15:00	Florent Hivert	Université Paris-Saclay	Diagrammatic for Okada monoid and algebra
15:40	Reymond Akpanya	RWTH Aachen University	Classification of face-transitive surfaces
16:20	Maena Quemener	ENS Paris-Saclay	Real-rootedness and stability of combinatorial polynomials

Tuesday, March 5th 2024, room B1 (ground floor edifici històric mathemàtiques)

15:00	Guillem Perarnau	Universitat Politècnica de Catalunya	Random w-trees and automata syncronization
15:40	Juan Pablo Peña Alcayaga	Universidad de Chile	Bounding the proper conflict-free and odd chromatic number
16:20	Monica Reyes	Universitat de Lleida	Johnson graphs in the analysis of spectral properties of token graphs

Tuesday, January 30th 2024, seminar room IMUB (top floor edifici històric mathemàtiques)

15:00	Nantel Bergeron	York University	The excedance quotient of the Bruhat order and Quasisymmetric Varieties
15:40	Aram Dermenjian	University of Manchester	Enumerating Weyl Cones of Shi arrangements
16:20	Robin Simoens	Ghent University	Cospectral mates for generalized Johnson and Grassmann graphs

Tuesday, November 7th 2023, seminar room IMUB (top floor edifici històric mathemàtiques)

15:00	Cristina Dalfó	Universitat de Lleida	A general method to find the spectrum and eigenspaces of the token graph of a cycle
15:40	Sara Asensio	Universidad de Valladolid	The sensitivity conjecture and its resolution via graph theory
16:20	Gil Puig i Surroca	Université Paris Dauphine	On maximum acyclic sets and random regular digraphs

Tuesday, October 24th 2023, seminar room IMUB (top floor edifici històric mathemàtiques)

15:30	Jérémie Chalopin	Aix-Marseille Université	Unlabeled Sample Compression Schemes and Corner Peelings for Ample and Maximum Classes
16:10	Kolja Knauer	Universitat de Barcelona	Beyond Symmetry in Generalized Petersen graphs
16:50	Eva Philippe	Universitat de Barcelona	Geometric realizations via triangulations of flow polytopes

Thursday, September 14th 2023, room S3 (basement edifici històric mathemàtiques)

15:30	Vincent Pilaud	Universitat de Barcelona	Deformed permutahedra, quotientopes and beyond
16:10	Victor Poupet	Université Montpellier	Reconstructing words using queries on subwords or factors
16:50	Petru Valicov	Université Montpellier	Computer assisted proofs for discharging method on planar graphs

Wednesday, June 21st 2023, room B5 (ground floor edifici històric mathemàtiques)

15:30	Emeric Gioan	Université Montpellier	Geometrical interpretations of the Tutte polynomial in hyperplane arrangements and oriented matroids
16:10	František Kardoš	Univerzita Komenského v Bratislave	New reducible configurations for Barnette's conjecture
16:50	Bernat Rovira Segú	Universitat de Barcelona	On Outerplanar Partial Cubes

Tuesday, May 16th 2023, room T2 (top floor edifici històric mathemàtiques)

15:30	Bruno Benedetti	University of Miami	Vertex Labeling Properties on Simplicial Complexes
16:10	Juanjo Rué	Universitat Politècnica de Catalunya	Asymptotic enumeration of bipartite planar maps and graphs
16:50	Rangel Hernández Ortiz	Universitat Rovira i Virgili	Roudneff’s conjecture in dimension 4

Tuesday, October 25th 2022, room 113 (ground floor edifici històric filologia)

15:00	Jérémie Chalopin	Aix-Marseille Université	A local-to-global characterization of Helly graphs
15:40	Victor Chepoi	Aix-Marseille Université	On biautomaticity of Helly groups and CB-groups
16:20	Julian Pfeifle	Universitat Politècnica de Catalunya	Practical semidefinite programming bounds in Julia for Lovász' Theta function

Tuesday, October 4th 2022, room 312 (top floor edifici històric filologia)

15:00	Arnau Padrol	Universitat de Barcelona	Many polytopes
15:40	Anna de Mier	Universitat Politècnica de Catalunya	The chromatic symmetric function and polynomials for marked graphs
16:20	Torsten Ueckerdt	Karlsruher Institut für Technologie	When Catching is not Surrounding in Cops and Robber

Thursday, July 14th 2022, room T2 (top floor edifici històric mathemàtiques)

15:00	Anton Dochtermann	Texas State University	Completing shellings and Simon’s conjecture for matroids
15:40	Carolina Benedetti	Universidad de los Andes	Quotients of lattice path matroids
16:20	Gil Puig i Surroca	Universitat de Barcelona	The representation problem, monoids and sparse graph classes

organizer

Kolja Knauer, Universitat de Barcelona