The 15th Combinatorics Days - Universidade de Évora, Évora
December 5-6, 2025
Day 1: December 5th, Friday
9:00-10:30 Maria Bras-Amorós (Universitat Politècnica de Catalunya):
Mini-course: Numerical semigroups, conjectures, algorithms, and applications I
10:30-11:00 Coffee
11:00-12:00 Evgeny Feigin (Tel Aviv University):
Mini-course - Cauchy identities: combinatorics and representation theory I
12:00-12:30 Diogo Soares (CMUC):
Maximal number of one-element commutation classes of a permutation
12:30-15:00 Lunch
15:00 - 16:00 Evgeny Feigin (Tel Aviv University):Mini-course - Cauchy identities: combinatorics and representation theory II
16:00-16:30 Inês Rodrigues (FCT NOVA):
Crystals and quasi-crystals: local axioms and connections to quasi-symmetric functions
16:30-17:00 Coffee
17:00-17:30 Ana Rodrigues (University of Évora):
Translated Cone Exchange transformations and combinatorics
17:30-18:00 Henrique Cruz (University of Covilhã):
Antichains in the Bruhat Order for the Classes A(n,k)
18:00-18:30 Bruno Dinis (University of Évora):
Plectology
20:00 Dinner
Day 2: December 6th, Saturday
9:00-10:30 Maria Bras-Amorós (Universitat Politècnica de Catalunya):
Mini-course: Numerical semigroups, conjectures, algorithms, and applications II
10:30-11:00 Coffee
11:00-12:00 Evgeny Feigin (Tel Aviv University) :
Mini-course - Cauchy identities: combinatorics and representation theory III
12:00-12:30 Carla Rizzo (CMUC):
Combinatorial aspects of polynomial identities in algebras
12:30-14:30 Lunch
14:30-15:30 Serguei Popov (CMUP):
Conditioned simple random walk in two dimensions and some of its surprising properties
15:30-16:00 Marija Dodig (FCUL):
Is bounded rank perturbation just a completion problem?
16:00-16:30 Coffee
16:30-17:00 Maria Ana Sottomayor (UP):
Finitely generated subgroups of plain groups
17:00-17:30 Carlos Correia (University of Évora):
Numerical semigroups and cycles of discrete dynamical systems
Lectures will take place in Anfiteatro 1 - Colégio Luís António Verney (CLAV) - Departamento de Matemática - Rua Romão Ramalho, Universidade de Évora , Évora.
Organisers: Olga Azenhas (CMUC, UC), Manuel Branco (CIMA, UE), João Dias (CIMA, UE) Samuel Lopes (CMUP, FCUP).
Participants: Olga Azenhas (UC), Manuel Branco (U. Évora), Maria Bras-Amorós (Universitat Politècnica de Catalunya), Francisco Brito (U. Évora), Carlos Correia (U. Évora), Henrique Cruz (U. Covilhã), João Dias (U. Évora), Bruno Dinis (U. Évora), Evgeny Feigin (Tel Aviv University), Samuel Lopes (UP), Maria Pastora Revuelta Marchena (Universidad Sevilla), Pedro Macias Marques (U. Évora), Serguei Popov (CMUP), Carla Rizzo (CMUC), Ana Rodrigues (U. Évora), Inês Rodrigues (UNL), Suhail Sherif (UL), Diogo Soares (UC), Maria Ana Sottomayor (UP), Marko Stosic (UL), Martim Simão Tavares (U. Évora), Bruce Westbury.
For questions and registration send an email to combdays15@gmail.com
Accommodation: Participants are expected to arrive on Thursday evening. The following are some hotels:
Moov Hotel Évora Holiday Inn Express Évora
Sponsors: Departamento de Matemática and Escola de Ciências e Tecnologia - Universidade de Évora, UIDB/04674/2025 (CENTER IN MATHEMATICS AND APPLICATIONS) CIMA, UID/00324/2025 (Centre for Mathematics University of Coimbra) CMUC/UC, UID/00144/2025 (Center for Mathematics of University of Porto) CMUP, CIM and FCT. Funded by national funds through the FCT – Fundação para a Ciência e a Tecnologia.
