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摘要翻译:
设C是非奇异基簇S上的曲线,我们研究了对称幂C^[n]和Jacobian J上的代数圈。C^ 是所有C^[n]的和,C^的Chow同调是一个使用Pontryagin积的环。我们证明了该环同构于Chow环CH(J)上通常多项式环(变量:t)上的Pd-多项式代数(变量:u)。我们给出了两个在一般基上不同的同构。进一步,我们给出了CH(J)如何嵌入到CH(C^)中的一些精确结果,并给出了关于t和u的导子如何作用的显式几何描述。我们的结果对Jacobian的周环提出了一个新的分级。用Q张量后,相关的下降滤波与Beauville分解得到的下降滤波一致。我们得到的评分一般不同于Beauville的评分。最后,我们给出了重言类的主要结果的一个版本,并说明了我们的方法如何给出Herbaut和van der Geer-Kouvidakis所得到的一些关系的非常简单的几何证明。
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英文标题:
《Algebraic cycles on the relative symmetric powers and on the relative
Jacobian of a family of curves. II》
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作者:
Ben Moonen and Alexander Polishchuk
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最新提交年份:
2009
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分类信息:
一级分类:Mathematics 数学
二级分类:Algebraic Geometry 代数几何
分类描述:Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology
代数簇,叠,束,格式,模空间,复几何,量子上同调
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英文摘要:
Let C be a curve over a non-singular base variety S. We study algebraic cycles on the symmetric powers C^[n] and on the Jacobian J. The Chow homology of C^, the sum of all C^[n], is a ring using the Pontryagin product. We prove that this ring is isomorphic to CH(J)[t]<u>, the PD-polynomial algebra (variable: u) over the usual polynomial ring (variable: t) over the Chow ring CH(J). We give two such isomorphisms that over a general base are different. Further we give some precise results on how CH(J) sits embedded in CH(C^) and we give an explicit geometric description of how the derivations with regard to t and u act. Our results give rise to a new grading on the Chow ring of the Jacobian. After tensoring with Q the associated descending filtration coincides with the one coming from Beauville's decomposition. The grading we obtain is in general different from Beauville's. Finally we give a version of our main result for tautological classes, and we show how our methods give a very simple and geometric proof of some relations obtained by Herbaut and van der Geer-Kouvidakis.
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PDF链接:
https://arxiv.org/pdf/0805.3621
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