Weighted Completion of Galois Groups and Galois Actions on the Fundamental Group of P1 - {0,1, ∞}
Weighted Completion of Galois Groups and Galois Actions on the Fundamental Group of P1 - {0,1, ∞}
复制标题
伽罗瓦群的加权完成和基本群 P1 - {0,1, ∞} 上的伽罗瓦动作
作者:
R. Hain;M. Matsumoto
Fix a prime number ℓ. We prove a conjecture stated by Ihara, which he attributes to Deligne, about the action of the absolute Galois group on the pro-ℓ completion of the fundamental group of the thrice punctured projective line. Similar techniques are also used to prove part of a conjecture of Goncharov, also about the action of the absolute Galois group on the fundamental group of the thrice punctured projective line. The main technical tool is the weighted completion of a profinite group with respect to a reductive representation (and other appropriate data).