The section conjecture for the toric fundamental group over $p$-adic fields

Abstract

Loosely speaking, the toric fundamental group is the Tannaka dual of a category of vector bundles which become direct sums of line bundles on a finite étale cover. In characteristic $0$, it is an extension of the étale fundamental group scheme by a projective limit of tori. We prove the analogue of Grothendieck's section conjecture for the toric fundamental group over $p$-adic fields. As a consequence, we give a new interpretation of Selmer sections as toric Galois sections.

arXiv commentThe first versions of the paper contained a serious mistake, spotted by Y. Hoshi and A. Tamagawa. In this version, the mistake has been corrected