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The p-adic analytic space of pseudocharacters of a profinite group and pseudorepresentations over arbitrary rings

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 نشر من قبل Gaetan Chenevier
 تاريخ النشر 2013
  مجال البحث
والبحث باللغة English
 تأليف Gaetan Chenevier




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Let G be a profinite group which is topologically finitely generated, p a prime number and d an integer. We show that the functor from rigid analytic spaces over Q_p to sets, which associates to a rigid space Y the set of continuous d-dimensional pseudocharacters G -> O(Y), is representable by a quasi-Stein rigid analytic space X, and we study its general properties. Our main tool is a theory of determinants extending the one of pseudocharacters but which works over an arbitrary base ring; an independent aim of this paper is to expose the main facts of this theory. The moduli space X is constructed as the generic fiber of the moduli formal scheme of continuous formal determinants on G of dimension d. As an application to number theory, this provides a framework to study the generic fibers of pseudodeformation rings (e.g. of Galois representations), especially in the residually reducible case, and including when p <= d.



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