English

Moduli of $\ell$-adic pro-\'etale local systems for smooth non-proper schemes

Algebraic Geometry 2019-04-18 v1

Abstract

Let XX be a smooth scheme over an algebraically closed field. When XX is proper, it was proved in \cite{me1} that the moduli of \ell-adic continuous representations of π1\et(X)\pi_1^\et(X), \LocSys(X)\LocSys(X), is representable by a (derived) \Ql\Ql-analytic space. However, in the non-proper case one cannot expect that the results of \cite{me1} hold mutatis mutandis. Instead, assuming \ell is invertible in XX, one has to bound the ramification at infinity of those considered continuous representations. The main goal of the current text is to give a proof of such representability statements in the open case. We also extend the representability results of \cite{me1}. More specifically, assuming XX is assumed to be proper, we show that \LocSys(X)\LocSys(X) admits a canonical shifted symplectic form and we give some applications of such existence result.

Keywords

Cite

@article{arxiv.1904.08001,
  title  = {Moduli of $\ell$-adic pro-\'etale local systems for smooth non-proper schemes},
  author = {Jorge António},
  journal= {arXiv preprint arXiv:1904.08001},
  year   = {2019}
}