Parabolic Simple $\mathscr{L}$-Invariants

TL;DR

This paper extends the study of Fontaine-Mazur parabolic simple $ ext{ extscr}$-invariants for certain non-crystalline $p$-adic Galois representations, connecting them with locally analytic representations and automorphic forms.

Contribution

It constructs a local $ ext{ extscr}$-invariant representation $ ext{ extscr}( ho_L)$ for general non-crystalline cases and relates it to automorphic representations, generalizing previous trianguline results.

Findings

$ ext{ extscr}( ho_L)$ encodes parabolic simple $ ext{ extscr}$-invariants for $ ho_L$.

Under certain conditions, $ ext{ extscr}( ho_L)$ appears as a subrepresentation in automorphic forms.

Equality of Breuil's and Fontaine-Mazur $ ext{ extscr}$-invariants is established in the automorphic setting.

Abstract

Let $L$ be a finite extension of $\mathbf{Q}_p$. Let $\rho_L$ be a potentially semi-stable non-crystalline $p$-adic Galois representation such that the associated $F$-semisimple Weil-Deligne representation is absolutely indecomposable. In this paper, we study Fontaine-Mazur parabolic simple $\mathscr{L}$-invariants of $\rho_L$, which was previously only known in the trianguline case. Based on the previous work on Breuil's parabolic simple $\mathscr{L}$-invariants, we attach to $\rho_L$ a locally $\mathbf{Q}_p$-analytic representation $\Pi(\rho_L)$ of $\mathrm{GL}_{n}(L)$, which carries the information of parabolic simple $\mathscr{L}$-invariants of $\rho_L$. When $\rho_L$ comes from a patched automorphic representation of $\mathbf{G}(\mathbb{A}_{F^+})$ (for a define unitary group $\mathbf{G}$ over a totally real field $F^+$ which is compact at infinite places and $\mathrm{GL}_n$ at $p$-adic places), we prove under mild hypothesis that $\Pi(\rho_L)$ is a subrepresentation of the associated Hecke-isotypic subspace of the Banach spaces of (patched) $p$-adic automophic forms on $\mathbf{G}(\mathbb{A}_{F^+})$, this is equivalent to say that the Breuil's parabolic simple $\mathscr{L}$-invariants are equal to Fontaine-Mazur parabolic simple $\mathscr{L}$-invariants.