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arXiv 0705.1035math.AGmath.AT
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等变Chow环与极小秩奇妙对称簇的Chern类

Equivariant Chow ring and Chern classes of wonderful symmetric varieties of minimal rank

Michel Brion, Roy Joshua

摘要:

通过对相应复曲面簇$Y$的限制,刻画了极小秩对称空间的奇妙紧化$X$的等变Chow环.此外,我们还证明了切丛$T_X$及其对数类似物$S_X$对$Y$的限制分解为线丛的直和。这就给出了$T_X$和$S_X$的等变陈类的封闭公式,反过来,也给出了Kiritchenko考虑的约化群的陈类的封闭公式。

英文摘要:

We describe the equivariant Chow ring of the wonderful compactification $X$ of a symmetric space of minimal rank, via restriction to the associated toric variety $Y$. Also, we show that the restrictions to $Y$ of the tangent bundle $T_X$ and its logarithmic analogue $S_X$ decompose into a direct sum of line bundles. This yields closed formulae for the equivariant Chern classes of $T_X$ and $S_X$, and, in turn, for the Chern classes of reductive groups considered by Kiritchenko.

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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