Automorphisms of fiber surfaces of genus $2$, inducing the identity in cohomology

Automorphisms of fiber surfaces of genus $2$, inducing the identity in cohomology
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DOI:
10.1090/s0002-9947-05-03752-9
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发表时间:
2005-04
影响因子:
1.3
通讯作者:
J. Cai
J. Cai
中科院分区:
数学1区
文献类型:
--
作者:
J. Cai

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设S是亏格为2的一般非奇异射影曲面,x(O S)>5.设G_Caut S是S自同构的一个非平凡子群,在H_i(S,Q)上诱导对所有i的平凡作用,则|G|=2,K_2 S=4x(O S),Q(S)=1.给出了这类曲面的例子.
Let S be a complex non-singular projective surface of general type with a genus 2 fibration and x(O S ) > 5. Let G C Aut S be a non-trivial subgroup of automorphisms of S, inducing trivial actions on H i (S,Q) for all i. Then |G| = 2, K 2 S = 4x(O S ) and q(S) = 1. Examples of such surfaces are given.