English

On certain cohomology groups attached to $\mathfrak{p}^{\infty}$-towers of quaternionic Hilbert modular varieties

Number Theory 2020-12-17 v1

Abstract

For a totally real number field FF and a nonarchimedean prime p\mathfrak{p} of FF lying above a prime number pp we introduce certain sheaf cohomology groups that intertwine the p\mathfrak{p}^{\infty}-tower of a quaternionic Hilbert modular variety associated to a quaternion algebra DD over FF that is split at p\mathfrak{p} and a pp-adically admissible representation of \mboxPGL2(Fp)\mbox{PGL}_2(F_{\mathfrak{p}}). Applied to infinitesimal pp-adic deformations of the local factor at p\mathfrak{p} of a cuspidal automorphic representation π\pi of D(A)D^*(\mathbb{A}) this yields a natural construction of infinitesimal deformations of the Galois representation attached to π\pi.

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Cite

@article{arxiv.2012.08585,
  title  = {On certain cohomology groups attached to $\mathfrak{p}^{\infty}$-towers of quaternionic Hilbert modular varieties},
  author = {Michael Spieß},
  journal= {arXiv preprint arXiv:2012.08585},
  year   = {2020}
}

Comments

129 pages