Motzkin combinatorics in linear degenerations of the flag variety
Representation Theory
2021-12-07 v1 Combinatorics
Abstract
We establish an explicit combinatorial/homological characterization of supports for linear degenerations of flag varieties. For such purpose, we introduce the concept of an excessive multisegment. It provides a new class of combinatorial objects counted by Motzkin numbers.
Keywords
Cite
@article{arxiv.2112.02539,
title = {Motzkin combinatorics in linear degenerations of the flag variety},
author = {Giovanni Cerulli Irelli and Francesco Esposito and Mario Marietti},
journal= {arXiv preprint arXiv:2112.02539},
year = {2021}
}