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arXiv 1802.01503math.AG
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Motivic Chern类与K-理论稳定包络

Motivic Chern classes and K-theoretic stable envelopes

Laszlo M. Feher, Richard Rimanyi, Andrzej Weber

摘要:

研究了奇异簇的一个K-理论示性类,即等变motivic Chern类.我们证明了motivic陈类的特点是由一个公理系统的启发“K-理论稳定的信封,”最近定义的Okounkov和量子群行动的模空间的K-理论代数的关系进行了研究。我们还给出了Schubert胞腔和矩阵Schubert胞腔的等变动机Chern类的显式公式。最后,我们计算的A2的表示的轨道的等变motivic陈类,从而产生的motivic陈类的行列式品种和更一般的退化轨迹的公式。

英文摘要:

We study a K-theoretic characteristic class of singular varieties, namely the equivariant motivic Chern class. We prove that the motivic Chern class is characterized by an axiom system inspired by that of "K-theoretic stable envelopes," recently defined by Okounkov and studied in relation with quantum group actions on the K-theory algebra of moduli spaces. We also give explicit formulas for the equivariant motivic Chern classes of Schubert cells and matrix Schubert cells. Lastly, we calculate the equivariant motivic Chern class of the orbits of the A2 quiver representation, which yields formulas for the motivic Chern classes of determinantal varieties and more general degeneracy loci.

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