2 papers
math.CO2025
Chute Move Posets are Lattices
Ilani Axelrod-Freed, Colin Defant, Hanna Mularczyk +2
For each permutation , we consider the set of reduced pipe dreams for , partially ordered so that cover relations correspond to (generalized) chute moves. Se…
math.CO2024
Oriented matroid structures on rank 3 root systems
Grant Barkley, Katherine Tung
We show that, given a rank 3 affine root system with Weyl group , there is a unique oriented matroid structure on which is -equivariant and restricts to the usual m…