Positivity in equivariant Schubert calculus

Positivity in equivariant Schubert calculus
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DOI:
10.1215/s0012-7094-01-10935-6
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发表时间:
1999-08
影响因子:
2.5
通讯作者:
W. Graham
W. Graham
中科院分区:
数学1区
文献类型:
--
作者:
W. Graham

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我们证明了 Dale Peterson 关于 flag 簇 T 等变上同调乘法正性的猜想。该定理源自关于簇的等变上同调与具有有限多个轨道的可解群的作用的更一般的正性结果。这个更一般的结果是 Kumar 和 Nori 定理的等变版本。
We prove a conjecture of Dale Peterson on positivity in the multiplication in the T-equivariant cohomology of the flag variety. The theorem follows from a more general positivity result about the equivariant cohomology of varieties with actions of a solvable group with finitely many orbits. This more general result is an equivariant version of a theorem of Kumar and Nori.