English

On the capitulation problem of some pure metacyclic fields of degree 20

Number Theory 2021-01-27 v2

Abstract

Let Γ=Q(n5)\Gamma \,=\, \mathbb{Q}(\sqrt[5]{n}) be a pure quintic field, where nn is a positive integer 5th5^{th} power-free, k0=Q(ζ5)k_0\,=\,\mathbb{Q}(\zeta_5) be the cyclotomic field containing a primitive 5th5^{th} root of unity ζ5\zeta_5, and k=Q(n5,ζ5)k\,=\,\mathbb{Q}(\sqrt[5]{n},\zeta_5) the normal closure of Γ\Gamma. Let k5(1)k_5^{(1)} be the Hilbert 55-class field of kk, Ck,5C_{k,5} the 55-ideal classes group of kk, and Ck,5(σ)C_{k,5}^{(\sigma)} the group of ambiguous classes under the action of Gal(k/k0)Gal(k/k_0) = σ\langle\sigma\rangle. When Ck,5C_{k,5} is of type (5,5)(5,5) and rank Ck,5(σ)=1C_{k,5}^{(\sigma)}\,=\,1, we study the capitulation problem of the 55-ideal classes of Ck,5C_{k,5} in the six intermediate extensions of k5(1)/kk_5^{(1)}/k.

Keywords

Cite

@article{arxiv.2010.15935,
  title  = {On the capitulation problem of some pure metacyclic fields of degree 20},
  author = {Fouad Elmouhib and Mohamed Talbi and Abdelmalek Azizi},
  journal= {arXiv preprint arXiv:2010.15935},
  year   = {2021}
}

Comments

10 pages, 1 figures