On the Galois Actions on Torsors of Paths I, Descent of Galois Representations
On the Galois Actions on Torsors of Paths I, Descent of Galois Representations
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关于路径 Torors 的伽罗瓦作用 I,伽罗瓦表示的下降
DOI:
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发表时间:
2007
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通讯作者:
Z. Wojtkowiak
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作者:
Z. Wojtkowiak
We are studying representations obtained from ac- tions of Galois groups on torsors of paths on a projective line minus a finite number of points. Using these actions on torsors of paths, we construct geometrically representations of Galois groups which re- alize � -adically the associated graded Lie algebra of the fundamental group of the tannakian category of mixed Tate motives over SpecZ, Spec Z(i), Spec Z( 1 ), Spec OQ( √ −q) for any prime number q (q � in the last case) and over Spec O Q( √ −q) ( 1 ) for any prime number q congruent to 3 modulo 4 and also for q =2 .