Invariants, torsion indices and oriented cohomology of complete flags
Invariants, torsion indices and oriented cohomology of complete flags
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完整旗形的不变量、扭转指数和定向上同调
DOI:
10.24033/asens.2192
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
K. Zainoulline
中科院分区:
文献类型:
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作者:
B. Calmès;V. Petrov;K. Zainoulline
In the present notes we generalize the classical work of Demazure [Invariants sym\'etriques entiers des groupes de Weyl et torsion] to arbitrary oriented cohomology theories and formal group laws. Let G be a split semisemiple linear algebraic group over a field and let T be its split maximal torus. We construct a generalized characteristic map relating the so called formal group ring of the character group of T with the cohomology of the variety of Borel subgroups of G. The main result of the paper says that the kernel of this map is generated by W-invariant elements, where W is the Weyl group of G. As one of the applications we provide an algorithm (realized as a Macaulau2 package) which can be used to compute the ring structure of an oriented cohomology (algebraic cobordism, Morava $K$-theories, connective K-theory, Chow groups, K_0, etc.) of a complete flag variety.
DOI:
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发表时间:
2007
期刊:
J.London Math. .Soc. 76
影响因子:
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作者:
A.Vishik;N.Yagita
通讯作者:
N.Yagita