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20242026
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math.NT2026

On semi-stable integral models for Shimura varieties

Jie Yang, Ioannis Zachos, Zhihao Zhao

We construct (potentially) semi-stable integral models for a class of Shimura varieties with maximal parahoric level at an odd prime . The main input is an explicit construction…

math.NT2026

On -adic integral moduli schemes and local models for PEL type D

Jie Yang, Ioannis Zachos, Zhihao Zhao

We construct flat integral moduli schemes of PEL type D and the corresponding flat orthogonal Rapoport--Zink spaces with parahoric level structure over a -adic integer ring. The…

math.NT2025

Topological flatness of orthogonal spin local models

Jie Yang

Let be an odd prime and be a complete discretely valued field with residue field of characteristic . For any parahoric level structure of the split even orthogonal simil…

math.NT2025

On the flatness of spin local models for split even orthogonal groups

Jie Yang

Let be a complete discretely valued field with ring of integers and residue field of characteristic . Let denote the split orthogo…

math.NT2025

Prime Geodesic Theorem for Arithmetic Compact Surfaces: Principal Congruence Case

Chenhao Tang, Han Wu, Jie Yang +1

We generalize Koyama's bound of the error term in the prime geodesic theorems to the principal congruence subgroups for quaternion algebras. Our method avoids the spectral s…

math.NT2024

Wildly ramified unitary local models for special parahorics. The odd dimensional case

Jie Yang

We construct local models for wildly ramified unitary similitude groups of odd dimension with special parahoric level structure and signature . We first give a l…