Exact cohomology sequences with integral coefficients for torus actions

Exact cohomology sequences with integral coefficients for torus actions
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具有环面作用积分系数的精确上同调序列

DOI:
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发表时间:
2005
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通讯作者:
V. Puppe
V. Puppe
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文献类型:
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作者:
M. Franz;V. Puppe

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利用Atiyah在等变K-理论中应用的方法,Bredon得到了(足够好的)T-空间X,$T=(S^1)^n,$的等变骨架的相对上同调(具有有理系数)的精确序列,其中具有自由等变上同调$H_T ^*(X;{\mathbb Q})$ over $H_T^*({\rm pt};{\mathbb Q})=H^*(BT;{\mathbb Q})。在这里,我们证明了具有连通各向同性群的有限T-CW复形,对于这些复形,类似的结果在积分系数下成立。
Using methods applied by Atiyah in equivariant K-theory, Bredon obtained exact sequences for the relative cohomologies (with rational coefficients) of the equivariant skeletons of (sufficiently nice) T-spaces X, $T=(S^1)^n,$ with free equivariant cohomology $H_T^*(X;{\mathbb Q})$ over $H_T^*({\rm pt};{\mathbb Q})=H^*(BT;{\mathbb Q}).$ Here we characterise those finite T-CW complexes with connected isotropy groups for which an analogous result holds with integral coefficients.