Cycle classes on the moduli of K3 surfaces in positive characteristic

Cycle classes on the moduli of K3 surfaces in positive characteristic
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DOI:
10.1007/s00029-014-0156-8
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发表时间:
2011-04
期刊:
Selecta Mathematica
影响因子:
--
通讯作者:
T. Ekedahl;G. Geer
T. Ekedahl;G. Geer
中科院分区:
其他
文献类型:
--
作者:
T. Ekedahl;G. Geer

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本文给出了K3曲面族中高度不变层和Artin不变层的圈类的重言类的显式封闭公式。该证明对于所有层是统一的,并且使用标志空间作为Ekedahl和货车der Geer(代数、算术和几何、数学进展,第269-270卷,Birkhäuser,巴塞尔,2010)中针对阿贝尔簇族的Ekedahl-Oort层的计算,但是使用Pieri公式来确定下推到基空间。
This paper provides explicit closed formulas in terms of tautological classes for the cycle classes of the height and Artin invariant strata in families of K3 surfaces. The proof is uniform for all strata and uses a flag space as the computations in Ekedahl and van der Geer (Algebra, arithmetic and geometry, progress in mathematics, vol. 269–270, Birkhäuser, Basel, 2010) for the Ekedahl–Oort strata for families of abelian varieties, but employs a Pieri formula to determine the push down to the base space.