Special-points conjecture for Shimura varieties

Let (G,X)(G,X) be a Shimura pp-datum, let Shp(G,X)\operatorname{Sh}_{p}(G,X) be its integral model, and let F\mathbb{F} be the algebraic closure of the residue field. A point of Shp(G,X)\operatorname{Sh}_{p}(G,X) with coordinates in F\mathbb{F} is a point of the special fibre, and a special point is a point of the Shimura variety in characteristic zero arising from special homomorphisms. Special-points conjecture. Up to isogeny, every point on Shp(G,X)\operatorname{Sh}_{p}(G,X) with coordinates in F\mathbb{F} lifts to a special point on Shp(G,X)\operatorname{Sh}_{p}(G,X) with coordinates in a finite extension of B(F)B(\mathbb{F}).

The conjecture is forced by Conjecture LR+ because L(G,X)\mathcal{L}(G,X) contains only terms corresponding to special homomorphisms. The source states that it is proved for simple abelian varieties of PEL type by Zink, and cites announced broader results; thus the unrestricted formulation remains open in the supplied context.

Sources & referencesView supporting material

Primary source

J. S. Milne, “Points on Shimura varieties over finite fields: the conjecture of Langlands and Rapoport”, arXiv:0707.3173 (2009).

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