The strong Stark conjecture for totally odd characters

Abstract

We prove the $p$-part of the strong Stark conjecture for every totally odd character and every odd prime $p$. Let $L/K$ be a finite Galois CM-extension with Galois group $G$, which has an abelian Sylow $p$-subgroup for an odd prime $p$. We give an unconditional proof of the minus $p$-part of the equivariant Tamagawa number conjecture for the pair $(h^0(\mathrm{Spec}(L)),\mathbb{Z}[G])$ under certain restrictions on the ramification behavior in $L/K$.

arXiv comment15 pages