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arXiv 1107.6044math.AGhep-thmath.RT
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Motivic Donaldson-Thomas不变量与McKay对应

Motivic Donaldson-Thomas invariants and McKay correspondence

Sergey Mozgovoy

摘要:

设$G\subset SL_2(C)\subset SL_3(C)$是一个有限群.我们计算了$C^3/G$的crepant分辨率$Hilb^G(C^3)$的motivic Pandharipande-Thomas和Donaldson-Thomas不变量,推广了Gholampour和Jiang使用局部化技术计算数值DT/PT不变量的结果。我们的公式依赖于计算motivic唐纳森-托马斯不变量的一类特殊的箭与潜力。我们表明,这些motivic Donaldson-Thomas不变量是密切相关的多项式计数绝对不可分解的表示在有限域的Kac。我们制定了一个猜想的积极性唐纳森-托马斯不变量的广泛类颤抖的潜力。这个猜想,如果真的,意味着卡茨积极性猜想任意颤动。

英文摘要:

Let $G\subset SL_2(C)\subset SL_3(C)$ be a finite group. We compute motivic Pandharipande-Thomas and Donaldson-Thomas invariants of the crepant resolution $Hilb^G(C^3)$ of $C^3/G$ generalizing results of Gholampour and Jiang who computed numerical DT/PT invariants using localization techniques. Our formulas rely on the computation of motivic Donaldson-Thomas invariants for a special class of quivers with potentials. We show that these motivic Donaldson-Thomas invariants are closely related to the polynomials counting absolutely indecomposable quiver representations over finite fields introduced by Kac. We formulate a conjecture on the positivity of Donaldson-Thomas invariants for a broad class of quivers with potentials. This conjecture, if true, implies the Kac positivity conjecture for arbitrary quivers.

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