On the algebraicity of the zero locus of an admissible normal function

On the algebraicity of the zero locus of an admissible normal function
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关于容许正规函数的零轨迹的代数性

DOI:
10.1112/s0010437x1300729x
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发表时间:
2006
影响因子:
1.8
通讯作者:
G. Pearlstein
G. Pearlstein
中科院分区:
数学1区
文献类型:
--
作者:
P. Brosnan;G. Pearlstein

文献摘要

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摘要 我们证明光滑复代数簇上的容许正规函数的零轨迹是代数的。在本文的第二部分(即附录)中,我们计算了具有分裂极限的一变量容许实幂零轨道范畴的坦纳基伽罗瓦群。然后,我们使用这个答案来恢复德利涅未发表的定理,该定理描述了真实混合霍奇结构的 ${\mathrm{sl} }_{2} $-分裂。
Abstract We show that the zero locus of an admissible normal function on a smooth complex algebraic variety is algebraic. In Part II of the paper, which is an appendix, we compute the Tannakian Galois group of the category of one-variable admissible real nilpotent orbits with split limit. We then use the answer to recover an unpublished theorem of Deligne, which characterizes the ${\mathrm{sl} }_{2} $-splitting of a real mixed Hodge structure.