Spherical varieties and non-ordinary families of cohomology classes

2022/04/14 by Rob Rockwood, Rockwood, Rob
Mathematics · #Advanced Algebra and Geometry #Advanced Mathematical Identities #Algebraic Geometry and Number Theory #FOS: Mathematics #Number Theory (math.NT)

paper · pdf · doi:10.48550/arxiv.2204.07116

openalex publication_date 2022/04/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We give a construction of non-ordinary p-adic families of classes in the cohomology of locally symmetric spaces associated to spherical pairs of reductive groups. In the étale case, we show how to map these classes into Galois cohomology. The methods developed in this paper can be used to give new constructions of p-adic families of Euler systems and p-adic L-functions. As an example, we show how the constructions of this paper can be used to construct norm-compatible classes associated to non-ordinary Siegel modular forms, generalising p-part of the Lemma--Flach Euler system constructed by Loeffler--Skinner--Zerbes.

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