Galois rigidity of the étale fundamental groups of punctured projective lines.
Galois rigidity of the étale fundamental groups of punctured projective lines.
复制标题
刺穿射影线的étale基本群的伽罗瓦刚性。
DOI:
10.1515/crll.1990.411.205
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发表时间:
1990
期刊:
影响因子:
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通讯作者:
Hiroaki Nakamura
中科院分区:
文献类型:
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作者:
Hiroaki Nakamura
In this paper, we show that the etale fundamental group of a punctured projective line (with canonical exterior action of the absolute Galois group of the base field) determines the relative positions of the deleted points on the line, provided that the base field is finitely generated over ®, the rationals. By a punctured projective line over a field /c, we mean the projective line over k with finitely many /c-rational points effectively deleted.