K-rings of wonderful varieties and matroids
K-rings of wonderful varieties and matroids
复制标题
奇妙品种和拟阵的 K 形环
DOI:
10.1016/j.aim.2024.109554
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发表时间:
2024
影响因子:
1.7
通讯作者:
Proudfoot, Nicholas
中科院分区:
文献类型:
--
作者:
Larson, Matt;Li, Shiyue;Payne, Sam;Proudfoot, Nicholas
We study theK-ring of the wonderful variety of a hyperplane arrangement and give a combinatorial presentation that depends only on the underlying matroid. We use this combinatorial presentation to define theK-ring of an arbitrary loopless matroid. We construct an exceptional isomorphism, with integer coefficients, to the Chow ring of the matroid that satisfies a Hirzebruch–Riemann–Roch-type formula, generalizing a recent construction of Berget, Eur, Spink, and Tseng for the permutohedral variety (the wonderful variety of a Boolean arrangement). As an application, we give combinatorial formulas for Euler characteristics of arbitrary line bundles on wonderful varieties. We give analogous constructions and results for augmented wonderful varieties, and for Deligne–Mumford–Knudsen moduli spaces of stable rational curves with marked points.
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DOI:
10.1007/s00029-022-00771-5
发表时间:
2022
期刊:
Selecta mathematica. New series
影响因子:
--
作者:
Dastidar J;Ross D
通讯作者:
Ross D
DOI:
--
发表时间:
2020-10
期刊:
arXiv: Combinatorics
影响因子:
--
作者:
Federico Ardila;Mario Sánchez
通讯作者:
Federico Ardila;Mario Sánchez
影响因子:
1.1
作者:
E. Snapper
通讯作者:
E. Snapper
DOI:
10.1090/s0002-9939-04-07731-7
发表时间:
2003
期刊:
The British Journal of Occupational Therapy
影响因子:
--
作者:
E. Feichtner;Irene Mueller
通讯作者:
Irene Mueller
影响因子:
2.6
作者:
Spencer Backman;C. Eur;Connor Simpson
通讯作者:
Connor Simpson