Leclerc's conjecture on a cluster structure for type A Richardson varieties
Combinatorics
2022-10-25 v1 Rings and Algebras
Representation Theory
Abstract
Leclerc constructed a conjectural cluster structure on Richardson varieties in simply laced types using cluster categories. We show that in type A, his conjectural cluster structure is in fact a cluster structure. We do this by comparing Leclerc's construction with another cluster structure on type A Richardson varieties due to Ingermanson. Ingermanson's construction uses the combinatorics of wiring diagrams and the Deodhar stratification. Though the two cluster structures are defined very differently, we show that the quivers coincide and clusters are related by the twist map for Richardson varieties, recently defined by Galashin--Lam.
Cite
@article{arxiv.2210.13302,
title = {Leclerc's conjecture on a cluster structure for type A Richardson varieties},
author = {Khrystyna Serhiyenko and Melissa Sherman-Bennett},
journal= {arXiv preprint arXiv:2210.13302},
year = {2022}
}