The Q-Picard group of the moduli space of curves in positive characteristic

被引：12
|
作者：
Moriwaki, A [1 ]
机构：
[1] Kyoto Univ, Fac Sci, Dept Math, Kyoto 6068502, Japan
来源：
INTERNATIONAL JOURNAL OF MATHEMATICS | 2001年 / 12卷 / 05期
关键词：
D O I：
10.1142/S0129167X01000964
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
In this note, we prove that the Q-Picard group of the moduli space of n-pointed stable curves of genus g over an algebraically closed field is generated by the tautological classes. We also prove that the cycle map to the second etale cohomology group is bijective.
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页码：519 / 534
页数：16
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