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arXiv 2205.09660math.ATmath.ACmath.AGmath.CT
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有理$T^2$ -等变椭圆上同调的代数模型

An algebraic model for rational $T^2$-equivariant elliptic cohomology

Matteo Barucco

摘要:

从复数上的椭圆曲线C和单位元周围的坐标数据出发,构造了2-环面$T^2$的有理$T^2$ -等变椭圆上同调理论.该理论是通过在代数模型范畴$dA(T^2)$中构造一个对象$EC_{T^2}$来定义的,Greenlees和Shipley将其定义为Quillen-等价于有理$T^2$ -谱。这个结果是对圆的构造[Gre 05]的2-环面的推广。对象$EC_{T^2}$使用来自表面CxC的结构层的Cousin复合体的几何输入直接构建。

英文摘要:

We construct a rational $T^2$-equivariant elliptic cohomology theory for the 2-torus $T^2$, starting from an elliptic curve C over the complex numbers and a coordinate data around the identity. The theory is defined by constructing an object $EC_{T^2}$ in the algebraic model category $dA(T^2)$, which by Greenlees and Shipley is Quillen-equivalent to rational $T^2$-spectra. This result is a generalization to the 2-torus of the construction [Gre05] for the circle. The object $EC_{T^2}$ is directly built using geometric inputs coming from the Cousin complex of the structure sheaf of the surface CxC.

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