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arXiv 1808.07296math.AGmath.AT
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Grassmannian的Chow-Witt环上的定向Schubert演算

Oriented Schubert calculus in Chow-Witt rings of Grassmannians

Matthias Wendt

摘要:

我们应用以前的计算Chow-Witt环的格拉斯曼开发一个面向模拟的经典舒伯特演算。从而得到了Chow-Witt环和扭Witt群的环结构的完整的图解描述。在舒伯特演算的算术改进中,解子空间的重数是编码附加方向信息的二次型。我们还讨论了几个应用程序,如Chow-Witt版本的符号计数平衡子空间的Fehér和Matszangosz。

英文摘要:

We apply the previous calculations of Chow-Witt rings of Grassmannians to develop an oriented analogue of the classical Schubert calculus. As a result, we get complete diagrammatic descriptions of the ring structure in Chow-Witt rings and twisted Witt groups. In the resulting arithmetic refinements of Schubert calculus, the multiplicity of a solution subspace is a quadratic form encoding additional orientation information. We also discuss a couple of applications, such as a Chow-Witt version of the signed count of balanced subspaces of Fehér and Matszangosz.

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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