Chern–Schwartz–MacPherson cycles of matroids

Chern–Schwartz–MacPherson cycles of matroids
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拟阵的陈-施瓦茨-麦克弗森循环

DOI:
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发表时间:
2017
影响因子:
1.8
通讯作者:
Kristin M. Shaw
Kristin M. Shaw
中科院分区:
数学1区
文献类型:
--
作者:
Lucía López de Medrano;Felipe Rincón;Kristin M. Shaw

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定义了任意拟阵的Chern-Schwartz-MacPherson(CSM)圈。这些都是平衡的加权风扇上支持相应的伯格曼风扇的轴。在拟阵产生于复超平面排列A的情况下,我们证明了这些圈表示A的补的CSM类。我们还证明了,对于任何拟阵,它的CSM圈的程度是由(移位)的约化特征多项式的系数,CSM圈下拟阵多面体细分的赋值。
We define Chern–Schwartz–MacPherson (CSM) cycles of an arbitrary matroid. These are balanced weighted fans supported on the skeleta of the corresponding Bergman fan. In the case that the matroid arises from a complex hyperplane arrangement A , we show that these cycles represent the CSM class of the complement of A . We also prove that for any matroid, the degrees of its CSM cycles are given by the coefficients of (a shift of) the reduced characteristic polynomial, and that CSM cycles are valuations under matroid polytope subdivisions.
热带拟阵品种和周期交叉点的对角线
DOI: 10.1007/s13348-012-0072-1
发表时间: 2013
影响因子: 1.1
作者:
G. François;J. Rau
通讯作者: J. Rau
DOI: 10.4007/annals.2018.188.2.1
发表时间: 2018-09-01
影响因子: 4.9
作者:
Adiprasito, Karim;Huh, June;Katz, Eric
通讯作者: Katz, Eric