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Irreducible components of deformation spaces: wild 2-adic exercises

Pierre Colmez, Gabriel Dospinescu, Vytautas Paskunas

Number 15
Author Vytautas Paškūnas
Year 2013

We prove that the irreducible components of the space of framed deformations of the trivial 2-dimensional mod 2 representation of the absolute Galois group of Q_2 are in natural bijection with those of the trivial character, confirming a conjecture of B\"ockle. We deduce from this result that crystalline points are Zariski dense in that space: this provides the missing ingredient for the surjectivity of the p-adic local Langlands correspondence for GL_2(Q_p) in the case p=2 (the result was already known for p\geq 3).

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