We study the deformation theory of Galois representations whose restriction to every decomposition subgroup is abelian. As an application, we construct unramified non-solvable extensions over the field obtained by adjoining all p-power roots of unity to the field of rational numbers.
On unramified Galois extensions constructed using Galois representations
β Scribed by Hiroyuki Hasebe
- Book ID
- 105924377
- Publisher
- Springer
- Year
- 2002
- Tongue
- English
- Weight
- 94 KB
- Volume
- 109
- Category
- Article
- ISSN
- 0025-2611
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## Communicated by J. Tate Let \ be a two-dimensional semisimple odd representation of Gal(Q ΓQ) over a finite field of characteristic 5 which is unramified outside 5. Assuming the GRH, we show in accordance with a conjecture by Serre that \=/ a 5 Γ / b 5 , where a+b is odd.