arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1104.1832math.AT
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经典型旗流形的GKM图的上同调环

The cohomology ring of the GKM graph of a flag manifold of classical type

Yukiko Fukukawa, Hiroaki Ishida, Mikiya Masuda

摘要:

如果一个闭光滑流形$M$具有环面$T$的作用,且满足一定的条件,则一个在$H^2(BT)$中具有标号的标号图$\mG_M$与$M$相关联,它在$M$上编码了大量的几何信息.例如,$\mG_M$的“图上同调”环$\mHT^*(\mG_M)$被定义为$\bigoplus_{v\in V(\mG_M)}H^*(BT)$的子环,其中$V(\mG_M)$是$\mG_M$的顶点集,并且已知其通常同构于$M$的等变上同调$H^*_T(M)$。本文用$\Z$分别确定了$\mHT^*(\mG_M)$的环结构。$\Z[1/2]$)系数,当$M$是类型A、B或D的标志流形时(分别为(1)以基本的方式。

英文摘要:

If a closed smooth manifold $M$ with an action of a torus $T$ satisfies certain conditions, then a labeled graph $\mG_M$ with labeling in $H^2(BT)$ is associated with $M$, which encodes a lot of geometrical information on $M$. For instance, the "graph cohomology" ring $\mHT^*(\mG_M)$ of $\mG_M$ is defined to be a subring of $\bigoplus_{v\in V(\mG_M)}H^*(BT)$, where $V(\mG_M)$ is the set of vertices of $\mG_M$, and is known to be often isomorphic to the equivariant cohomology $H^*_T(M)$ of $M$. In this paper, we determine the ring structure of $\mHT^*(\mG_M)$ with $\Z$ (resp. $\Z[1/2]$) coefficients when $M$ is a flag manifold of type A, B or D (resp. C) in an elementary way.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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