The Chow ring of a classifying space
The Chow ring of a classifying space
复制标题
分类空间的 Chow 环
DOI:
10.1017/cbo9781139059480.003
复制
发表时间:
1998
期刊:
影响因子:
--
通讯作者:
B. Totaro
中科院分区:
文献类型:
--
作者:
B. Totaro
We define the Chow ring of the classifying space of a linear algebraic group. In all the examples where we can compute it, such as the symmetric groups and the orthogonal groups, it is isomorphic to a natural quotient of the complex cobordism ring of the classifying space, a topological invariant. We apply this to get torsion information on the Chow groups of varieties defined as quotients by finite groups. This generalizes Atiyah and Hirzebruch's use of such varieties to give counterexamples to the Hodge conjecture with integer coefficients.