This is the 10th edition of the Combinatorics Days, to be held online on the 30th of November and the 7th of December. It is a joint organization of CMUP and CMUC.

Tentative Programme

November 30th, Monday, Lisbon/London time

17:50--18:00 Gathering

18:00-18:30 Loïc Foissy (LMPA Joseph Liouville, Université du Littoral Côte d'Opale)

Algebraic structures on noncrossing partitions

18:40-19:05 Raul Penaguião (San Francisco State University)

Feasible regions meets pattern avoidance - The long awaited part three of feasible regions

19:15-19:40 Henrique Cruz (CMA, University of Beira Interior)

Classes of (0, 1)-matrices where the Bruhat order and the Secondary Bruhat order coincide

19:50-20:15 António Malheiro (CMA, FCT-University of NOVA Lisboa)

Crystals & Trees

December 7th, Monday, Lisbon/London time

16:50-17:00 Gathering

17:00-17:30 Per Alexandersson (University of Stockholm)

Skew specialized Macdonald polynomials and charge

17:40-18:05 João Miguel Santos (CMUC, University of Coimbra)

Symplectic right keys - Type C Willis' direct way

18:15-18:45 Jake Levinson (Simon Fraser University)

Axioms for shifted tableau crystals

18:55-19:20 Inês Rodrigues (CEAFEL, University of Lisbon)

Shifted Bender-Knuth moves and a shifted Berenstein-Kirillov group

19:30-19:55 Maria Manuel Torres (CEAFEL, University of Lisbon)

Eulerian polynomials via the Weyl Algebra action