Deformations of polarized automorphic galois representations and adjoint selmer groups

Patrick B. Allen

Research output: Contribution to journalArticlepeer-review


We prove the vanishing of the geometric Bloch-Kato Selmer group for the adjoint representation of a Galois representation associated to regular algebraic polarized cuspidal automorphic representations under an assumption on the residual image. Using this, we deduce that the localization and completion of a certain universal deformation ring for the residual representation at the characteristic zero point induced from the automorphic representation is formally smooth of the correct dimension. We do this by employing the Taylor-Wiles-Kisin patching method together with Kisin's technique of analyzing the generic fiber of universal deformation rings. Along the way we give a characterization of smooth closed points on the generic fiber of Kisin's potentially semistable local deformation rings in terms of their Weil-Deligne representations.

Original languageEnglish (US)
Pages (from-to)2407-2460
Number of pages54
JournalDuke Mathematical Journal
Issue number13
StatePublished - Sep 15 2016

ASJC Scopus subject areas

  • Mathematics(all)


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