Indices isotypiques des éléments cyclotomiques

Tatiana Beliaeva, Jean-Robert Belliard

Given $F$ a real abelian field, $p$ an odd prime and $\chi$ any Dirichlet character of $F$ we give a method for computing the $\chi$-index $\displaystyle (H^1(G_S,\mathbb{Z}_p(r))^χ: C^F…