Séminaire Lotharingien de Combinatoire, B89pref (2023), 1 p.

Riccardo Biagioli and Fabrizio Caselli

Préface

The 89th Meeting of the Séminaire Lotharingien de Combinatoire took place together with the BrentiFest from March 26 to March 29, 2023 in the University Centre of Bertinoro (Italy). The event was a great success thanks also to a special day dedicated to celebrate Francesco Brenti's 60th birthday, although with a delay of two years due to the pandemic. Colleagues and friends came from all over the world including Canada, Japan, and the United States. Overall there were almost 80 participants, making this edition one of the most attended of the Séminaire.

This edition also enjoyed the presence of a surprising number of young researchers in combinatorics. We organized also a poster session on Monday evening where many of them were able to present their work. See the complete list below, with links to most of the posters themselves. On Monday and Wednesday, Christian Stump presented a three-lecture mini course on Subword complexes and brick polyhedra, and there were eleven other contributed talks. See the complete list below, with links to the (non-blackboard) presentations.

Tuesday was dedicated to the BrentiFest: once again "happy birthday Francesco!". We enjoyed seven invited talks including two online presentations from the USA. We also witnessed two very moving messages of greetings from Anders Björner and Louis Billera who unfortunately could not attend the event. Then we celebrated in the evening with a social dinner. Some photos of the day are attached here.

We would like to thank all participants for enabling this beautiful celebration !

Invited talks at the BrentiFest

Minicourse

Christian STUMP: Subword complexes and brick polyhedra: from pipe dreams to Bruhat cones and generalized associahedra

Contributed talks

Posters

  • Doriann ALBERTIN: A quasisymmetric invariant for families of posets
  • Olga AZENHAS: Non Symmetric Cauchy kernel, crystals and last passage percolation
  • Lorenzo CAMPIONI: Maximal unrefinable partitions into distinct parts
  • Clément CHENEVIÈRE: On linear intervals in the alt ν-Tamari lattices
  • Sabino DI TRANI: Some combinatorial smoothness criteria for T-fixed points in flat linear degenerations
  • Corentin HENRIET: From Tamari intervals to planar simple triangulations
  • Hans HÖNGESBERG: Alternating sign matrices with reflective symmetry and plane partitions: n+3 pairs
  • Jihyeug JANG: Negative moments of orthogonal polynomials
  • Alexander LAZAR: Vertex order shellings
  • Loïc LE MOGNE: Deficit and (q,t)-symmetry in triangular Dyck paths
  • Germain POULLOT: Monotone path polytopes: the case of the hypersimplex Δ(n,2)
  • Andrea RIVEZZI: Combinatorics of the Universal Drinfeld-Yetter algebra
  • Florian SCHREIER-AIGNER: (-1)-Enumerations of arrowed Gelfand-Tsetlin patterns
  • Daniel TAMAYO JIMÉNEZ: Combinatorial Aspects of Realizations of the s-Permutahedron

    List of participants