01:06:22
publiée le 4 juin 2025
Frieze patterns from a geometric point of view: projective geometry and difference equations
De Valentin Ovsienko
Matrices filled by variables, from posets to Coxeter groups, and beyond
Apparaît dans la collection : Combinatorics and Arithmetic for Physics - 2024
Last year at CAP2023 I gave a talk about a class of matrices filled by variables, whose eigenvalues are linear forms in the variables. The construction was based on finite posets. I'll speak about a generalization to convex sets in general reflection groups, and even to the case where there is no group at all.
