Langlands program

Description

The Langlands program, broadly speaking, seeks to unify algebraic geometry, number theory, and harmonic analysis. More precisely, it posits that there is a tight connection between representations arising from these three (ostensibly disparate) sources. Its development has been influenced by, and in turn influenced, several areas of arithmetic geometry, notably rigid geometry and p-adic Hodge theory.

Some key phrases

Shimura varieties (local and global), L-parameters, Arthur--Selberg trace formula, and endoscopy.

Annotated list of my relevant papers

We prove a conjecture of Pappas and Rapoport for all Shimura varieties of abelian type with parahoric level structure when p > 3 by showing that the Kisin–-Pappas–Zhou integral models of Shimura varieties of abelian type are canonical. Inparticular, this shows that these models of are independent of the choices made during their construction, and that they satisfy functoriality with respect to morphisms of Shimura data.

In this paper we construct an object on the integral canonical models of Shimura varieties of abelian type (and hyperspecial level) which should be thought of as the prismatic realization of the universal G-motive on such an object. We use this to obtain new p-adic Hodge-theoretic information about such Shimura varieties, as well as characterizing them (even at finite levels). Along the way we develop an integral analogue of the functor D_crys, and relate it to Fontaine--Lafaille and Dieudonné theory.

In this article we show that Scholze's BdR^+-affine Grassmannian can be defined using sheafification with respect to the analytic (i.e., usual topological open cover Grothendieck topology) opposed to etale or v topologies.

In this paper we define a moduli space of L-parameters over the rational numbers, show it has good geometric properties (i.e. is smooth with explicitly parameterized geometric connected components), and show that there is a morphism from this moduli space to the moduli space of Weil--Deligne parameters which is an isomorphism over a dense open of the target.

In  previous work Scholze and Shin conjectured certain equations (the Scholze--Shin equations) should hold for the local Langlands correspondence for any group. In this article we showed that the Scholze--Shin equations (in fact only those for the trivial endoscopic groups) are enough (in addition to the usual desiderata) to characterize the local Langlands correspondence for many groups.

In  previous work Scholze and Shin conjectured certain equations (the Scholze--Shin equations) should hold for the local Langlands correspondence for any group. In this article we showed that the Scholze--Shin equations hold for the local Langlands correspondence for unramified unitary groups as developed by work of Mok.

In this paper I, following previous work of Scholze, define certain overconvergent open subsets of local Shimura varieties of abelian type.