Geometric Perspective on Piecewise Polynomiality of Double Hurwitz Numbers

Geometric Perspective on Piecewise Polynomiality of Double Hurwitz Numbers
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双赫维茨数分段多项式的几何视角

DOI:
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发表时间:
2013
期刊:
Canadian mathematical bulletin
影响因子:
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通讯作者:
Steffen Marcus
Steffen Marcus
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文献类型:
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作者:
R. Cavalieri;Steffen Marcus

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摘要:我们将双Hurwitz数描述为曲线${{overline{M}}_{g,n}}$模空间上的交数。利用双分枝循环下psi类交数的多项式性的一个结果,我们的公式用对$varphi$类的修正项的变化来解释双Hurwitz数室中的多项式性和过墙现象。我们将此解释为双分枝循环(仅在属0和1中已知)的多项式性的暗示性证据。
Abstract We describe double Hurwitz numbers as intersection numbers on the moduli space of curves ${{overline{M}}_{g,n}}$ Using a result on the polynomiality of intersection numbers of psi classes with the Double Ramification Cycle, our formula explains the polynomiality in chambers of double Hurwitz numbers and the wall-crossing phenomenon in terms of a variation of correction terms to the $varphi$ classes. We interpret this as suggestive evidence for polynomiality of the Double Ramification Cycle (which is only known in genera 0 and 1).
有理双赫尔维茨循环的多项式、穿墙和热带几何
DOI: 10.1016/j.jcta.2013.05.010
发表时间: 2013
期刊: J. Comb. Theory, Ser. A
影响因子: --
作者:
Aaron Bertram;Renzo Cavalieri;Hannah Markwig
通讯作者: Hannah Markwig