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arXiv 0903.0917math.RTmath.AG
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基于仿射Laumon空间K-理论的量子仿射Gelfand-Tsetlin基和量子环面代数

Quantum affine Gelfand-Tsetlin bases and quantum toroidal algebra via K-theory of affine Laumon spaces

Alexander Tsymbaliuk

摘要:

Laumon模空间是GL_n中从射影直线到旗簇的映射的模空间的某些光滑闭包。利用一定的自然对应构造了量子圈代数U_v(Lsl_n)在Laumon空间的等变K-理论中的作用.我们还构造了量子环面代数U^{tor}_v(Lsl}_n)在仿射型Laumon空间的等变K-理论中的作用。我们在仿射Gelfand-Tsetlin基上写出了这个作用的显式公式,对应于局部等变K-理论中的不动点基。

英文摘要:

Laumon moduli spaces are certain smooth closures of the moduli spaces of maps from the projective line to the flag variety of GL_n. We construct the action of the quantum loop algebra U_v(Lsl_n) in the equivariant K-theory of Laumon spaces by certain natural correspondences. Also we construct the action of the quantum toroidal algebra U^{tor}_v(Lsl}_n) in the equivariant K-theory of the affine version of Laumon spaces. We write down explicit formulae for this action in the affine Gelfand-Tsetlin base, corresponding to the fixed point base in the localized equivariant K-theory.

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