Standard monomial theory and toric degenerations of Richardson varieties in the Grassmannian
Standard monomial theory and toric degenerations of Richardson varieties in the Grassmannian
复制标题
标准单项式理论和格拉斯曼阶理查森簇的环面退化
DOI:
10.1007/s10801-021-01042-w
复制
发表时间:
2021
影响因子:
0.8
通讯作者:
Bonala N
中科院分区:
文献类型:
--
作者:
Bonala N
Richardson varieties are obtained as intersections of Schubert and opposite Schubert varieties. We provide a new family of toric degenerations of Richardson varieties inside Grassmannians by studying Gröbner degenerations of their corresponding ideals. These degenerations are parametrised by block diagonal matching fields in the sense of Sturmfels [33]. We associate a weight vector to each block diagonal matching field and study its corresponding initial ideal. In particular, we characterise when such ideals are toric, hence providing a family of toric degenerations for Richardson varieties. Given a Richardson varietyand a weight vectorarising from a matching field, we consider two ideals: an idealobtained by restricting the initial of the Plücker ideal to a smaller polynomial ring, and a toric ideal defined as the kernel of a monomial map. We first characterise the monomial-free ideals of form. Then we construct a family of tableaux in bijection with semi–standard Young tableaux which leads to a monomial basis for the corresponding quotient ring. Finally, we prove that whenis monomial-free and the initial ideal inis quadratically generated, then all three ideals in,and kercoincide, and provide a toric degeneration of.
登录
查看更多内容
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
V. Lakshmibai;J. Brown
通讯作者:
J. Brown
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
V. Lakshmibai;J. Brown
通讯作者:
J. Brown
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
V. Kreiman;V. Lakshmibai
通讯作者:
V. Lakshmibai
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
B. Sturmfels;A. Zelevinsky
通讯作者:
A. Zelevinsky
DOI:
--
发表时间:
2023
期刊:
影响因子:
--
作者:
Ding Ma;Koji Tasaka;Ryo Kanda;Naoki Fujita
通讯作者:
Naoki Fujita