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arXiv 1106.3136math.AGmath.SG
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真亏格0量子K-理论中的Hirzebrush-Riemann-Roch定理

The Hirzebruch--Riemann--Roch theorem in true genus-0 quantum K-theory

Alexander Givental, Valentin Tonita

摘要:

本文利用紧致复代数流形的上同调Gromov-Witten不变量,刻画了紧致复代数流形的亏格0 K-理论Gromov-Witten不变量.这是通过应用Kawasaki-Hirzebruch-Riemann-Roch公式的一个虚拟版本,用于表示亏格为0的稳定映射的模空间上的轨道丛的全纯欧拉示性数,分析了这种模空间的惯性栈的复杂组合结构,并采用了来自“fake”的各种量子Riemann-Roch公式。(即orbifold-ignorant)流形和orbifolds的量子K理论(公式,以前从Coates-Givental,Tseng和Coates-Corti-Iritani-Tseng的作品中已知,或Tonita在单独的论文中为此目的新开发)。最终制定结合属性的推翻拉格朗日锥在辛闭路空间(语言,已成为传统的描述生成函数的genus-0 Gromov-Witten理论)与一个新的框架“adelic特征”的这种锥。作为应用,我们证明了量子K-理论的被支配拉格朗日锥的切空间在Novikov变量的有限差分算子代数上具有模的自然结构。作为另一个应用,我们为维度为$\geq l_1^2+...+l_k^2-1$的复射影空间中的度方程$l_1,...,l_k$给出的每个完整交叉计算一个这样的切空间。

英文摘要:

We completely characterize genus-0 K-theoretic Gromov-Witten invariants of a compact complex algebraic manifold in terms of cohomological Gromov-Witten invariants of this manifold. This is done by applying (a virtual version of) the Kawasaki-Hirzebruch-Riemann-Roch formula for expressing holomorphic Euler characteristics of orbibundles on moduli spaces of genus-0 stable maps, analyzing the sophisticated combinatorial structure of inertia stacks of such moduli spaces, and employing various quantum Riemann--Roch formulas from "fake" (i.e. orbifold-ignorant) quantum K-theory of manifold and orbifolds (formulas, either previously known from works of Coates-Givental, Tseng, and Coates-Corti-Iritani-Tseng, or newly developed for this purpose in separate papers by Tonita). The ultimate formulation combines properties of overruled Lagrangian cones in symplectic loop spaces (the language, that has become traditional in description of generating functions of genus-0 Gromov-Witten theory) with a novel framework of "adelic characterization" of such cones. As an application, we prove that tangent spaces of the overruled Lagrangian cones of quantum K-theory carry a natural structure of modules over the algebra of finite-difference operators in Novikov's variables. As another application, we compute one of such tangent spaces for each of the complete intersections given by equations of degrees $l_1,...,l_k$ in a complex projective space of dimension $\geq l_1^2+...+l_k^2-1$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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