Main local tangent-space dimension conjecture for trianguline varieties

Let xXtri(r)x\in X_{\rm tri}^\square(\overline{r}) be a crystalline strictly dominant point whose Frobenius eigenvalues (φ1,,φn)(\varphi_1,\dots,\varphi_n) are pairwise distinct. Let wxw_x be the Weyl group element associated to xx, and set dx:=dwxd_x:=d_{w_x}. Tangent-space dimension conjecture.

dimk(x)TX~tri(r),x=lg(wx)dx+dimXtri(r)=lg(wx)dx+n2+[K:Qp]n(n+1)2.\dim_{k(x)}T_{\widetilde X_{\rm tri}^\square(\overline{r}),x}=\lg(w_x)-d_x+\dim X_{\rm tri}^\square(\overline{r})=\lg(w_x)-d_x+n^2+[K:\mathbb{Q}_p]\frac{n(n+1)}{2}.

This is the paper's main local conjecture about the geometry of the trianguline variety. It predicts the precise tangent-space dimension at crystalline strictly dominant points with distinct Frobenius eigenvalues; the supplied text gives no resolution status.

Sources & referencesView supporting material

Primary source

Christophe Breuil, Eugen Hellmann and Benjamin Schraen, “Smoothness and Classicality on eigenvarieties”, arXiv:1510.01222 (2015).

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