activity
20082025
most citedOn the connected components of moduli spaces of finite flat models

13 citations · 133 across the 34 of their papers we have counts for

collaborators

34 papers

math.NT2025

Finite Langlands correspondence

Naoki Imai

We construct the Langlands correspondence for connected reductive groups over finite fields, which we call the finite Langlands correspondence. We discuss also its relation with th…

math.NT2025

Langlands parameters for reductive groups over finite fields

Naoki Imai, David A. Vogan

We define Langlands parameters for connected reductive groups over finite fields and formulate the Langlands correspondence for finite fields using these parameters.

math.NT2025

An integral analogue of Fontaine's crystalline functor

Naoki Imai, Hiroki Kato, Alex Youcis

For a smooth formal scheme over the Witt vectors of a perfect field , we construct a functor from the category of prismatic -cry…

math.NT2024★ 8 cited

On the geometrization of the local Langlands correspondence

Naoki Imai

This is a survey paper on the geometrization of the local Langlands correspondence by Fargues-Scholze.

math.NT2024★ 1 cited

A Tannakian framework for prismatic -crystals

Naoki Imai, Hiroki Kato, Alex Youcis

We develop the Tannakian theory of (analytic) prismatic -crystals on a smooth formal scheme over the ring of integers of a discretely valued field with perfect re…

math.NT2024★ 4 cited

Dualizing complexes on the moduli of parabolic bundles

Linus Hamann, Naoki Imai

For a non-archimedean local field and a connected reductive group over equipped with a parabolic subgroup , we show that the dualizing complex on , t…

math.NT2023★ 2 cited

The prismatic realization functor for Shimura varieties of abelian type

Naoki Imai, Hiroki Kato, Alex Youcis

For the integral canonical model of a Shimura variety of abelian type at hyperspecial l…

math.NT2023

Rapoport-Zink spaces of type GU(2,n-2)

Maria Fox, Benjamin Howard, Naoki Imai

We describe the structure of the supersingular Rapoport-Zink space associated to the group of unitary similitudes of signature (2,n-2) for an unramified quadratic extension of p-ad…

math.NT2022★ 1 cited

Weights of mod automorphic forms and partial Hasse invariants

Wushi Goldring, Naoki Imai, Jean-Stefan Koskivirta

For a connected, reductive group over a finite field endowed with a cocharacter , we define the zip cone of as the cone of all possible weights of mod automorphi…

math.NT2022★ 5 cited

The Jacobson--Morozov morphism for Langlands parameters in the relative setting

Alexander Bertoloni Meli, Naoki Imai, Alex Youcis

We construct a moduli space of -parameters over , and show that it has good geometric properties (e.g. explicitly parametrized geometric…

math.AG2021★ 1 cited

Partial Hasse invariants for Shimura varieties of Hodge-type

Naoki Imai, Jean-Stefan Koskivirta

For a connected reductive group over a finite field, we define partial Hasse invariants on the stack of -zip flags. We obtain similar sections on the flag space of Shimura v…

math.NT2021

The supersingular locus of the Shimura variety of

Maria Fox, Naoki Imai

We study the supersingular locus of a reduction at an inert prime of the Shimura variety attached to . More concretely, we realize irreducible components of the…

math.NT2020★ 1 cited

Automorphic vector bundles on the stack of -zips

Naoki Imai, Jean-Stefan Koskivirta

For a connected reductive group over a finite field, we study automorphic vector bundles on the stack of -zips. In particular, we give a formula in the general case for the…

math.NT2020★ 3 cited

Local Langlands correspondences in -adic coefficients

Naoki Imai

Let be a prime number different from the residue characteristic of a non-archimedean local field . We give formulations of -adic local Langlands correspondences for…

math.RT2020

Mod Weil representations and Deligne--Lusztig inductions for unitary groups

Naoki Imai, Takahiro Tsushima

We study the mod Weil representation of a finite unitary group and related Deligne--Lusztig inductions. In particular, we study their decomposition as representations of a s…

math.NT2019★ 1 cited

Convolution morphisms and Kottwitz conjecture

Naoki Imai

We define etale cohomology of the moduli spaces of mixed characteristic local shtukas so that it gives smooth representations including the case where the relevant elements of the…

math.RT2019★ 2 cited

Shintani lifts for Weil representations of unitary groups over finite fields

Naoki Imai, Takahiro Tsushima

We construct extended Weil representations of unitary groups over finite fields geometrically, and show that they are Shintani lifts for Weil representations.

math.RT2018★ 10 cited

Geometric construction of Heisenberg-Weil representations for finite unitary groups and Howe correspondences

Naoki Imai, Takahiro Tsushima

We give a geometric construction of the Heisenberg-Weil representation of a finite unitary group by the middle étale cohomology of an algebraic variety over a finite field, whose r…

math.NT2016★ 3 cited

Potentially good reduction loci of Shimura varieties

Naoki Imai, Yoichi Mieda

In this paper, we give a notion of the potentially good reduction locus of a Shimura variety. It consists of the points which should be related with motives having potentially good…

math.NT2016★ 6 cited

Non-semi-stable loci in Hecke stacks and Fargues' conjecture

Ildar Gaisin, Naoki Imai

We show the Harris--Viehmann conjecture under some Hodge--Newton reducibility condition for a generalization of the diamond of a non-basic Rapoport--Zink space at infinite level, w…

math.NT2016★ 6 cited

Affinoids in the Lubin-Tate perfectoid space and simple supercuspidal representations II: wild case

Naoki Imai, Takahiro Tsushima

We construct a family of affinoids in the Lubin-Tate perfectoid space and their formal models such that the middle cohomology of their reductions realizes the local Langlands corre…

math.NT2015★ 13 cited

Local Galois representations of Swan conductor one

Naoki Imai, Takahiro Tsushima

We construct the local Galois representations over the complex field whose Swan conductors are one by using etale cohomology of Artin-Schreier sheaves on affine lines over finite f…

math.NT2015★ 1 cited

The remaining cases of the Kramer-Tunnell conjecture

Kestutis Cesnavicius, Naoki Imai

For an elliptic curve over a local field and a separable quadratic extension of , motivated by connections to the Birch and Swinnerton-Dyer conjecture, Kramer and Tunnel…

math.NT2015

Local root numbers of elliptic curves over dyadic fields

Naoki Imai

We consider an elliptic curve over a dyadic field with additive, potentially good reduction. We study the finite Galois extension of the dyadic field generated by the three-torsion…