Automorphic component conjecture for trianguline varieties

Let Xp\mathfrak{X}^p be an irreducible component of Xρˉp\mathfrak{X}^\square_{\bar{\rho}^p}. Let XX be an irreducible component of Xtri(ρˉp)X_{\rm tri}^\square(\bar{\rho}_p). By definition, XX is Xp\mathfrak{X}^p-automorphic if

ι(X)×Xp×Ug\iota(X)\times\mathfrak{X}^p\times\mathbb{U}^g

is an irreducible component of Xp(ρˉ)X_p(\bar{\rho}). Automorphic component conjecture. The component XX is Xp\mathfrak{X}^p-automorphic if and only if

XUtri(ρˉp)regX\cap U_{\rm tri}^\square(\bar{\rho}_p)^{\rm reg}

contains a crystalline point. The forward implication is known from the density theorem; the conjecture concerns the converse and can equivalently characterize the irreducible components of Xp(ρˉ)X_p(\bar{\rho}) in this way.

Sources & referencesView supporting material

Primary source

Christophe Breuil, Eugen Hellmann and Benjamin Schraen, “Une interprétation modulaire de la variété trianguline”, arXiv:1411.7260 (2015).

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