On genus change in algebraic curves over imperfect fields

On genus change in algebraic curves over imperfect fields
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不完美域上代数曲线的亏格变化

DOI:
10.1090/s0002-9939-08-09712-8
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发表时间:
2007
影响因子:
0.8
通讯作者:
S. Schroeer
S. Schroeer
中科院分区:
数学2区
文献类型:
--
作者:
S. Schroeer

文献摘要

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我们给出了一个新的证明,在图式理论的语言,泰特的经典结果的亏格变化的曲线在不完善的领域,在特征p > 0。也就是说,对于正规几何整曲线,代数闭包上的算术亏格和几何亏格之差可被(p-1)/2整除。
We give a new proof, in scheme-theoretic language, of Tate's classical result on genus change of curves over imperfect fields in characteristic p > 0. Namely, for normal geometrically integral curves, the difference between arithmetic and geometric genus over the algebraic closure is divisible by (p-1)/2.