The Geometry of Hida Families II: $\Lambda$-adic $(\varphi,\Gamma)$-modules and $\Lambda$-adic Hodge Theory

TL;DR

This paper develops $ ext{Lambda}$-adic $( ext{phi}, ext{Gamma})$-modules and Hodge theory, establishing comparison isomorphisms and duality theorems that deepen understanding of Hida families in $p$-adic geometry.

Contribution

It constructs $ ext{Lambda}$-adic crystalline and Dieudonné analogues of Hida's cohomology, proving comparison isomorphisms and providing new geometric proofs of key theorems.

Findings

Constructed $ ext{Lambda}$-adic crystalline and Dieudonné analogues.

Proved $ ext{Lambda}$-adic comparison isomorphisms.

Provided a geometric proof of Hida's finiteness and control theorems.

Abstract

We construct the $\Lambda$-adic crystalline and Dieudonn\'e analogues of Hida's ordinary $\Lambda$-adic \'etale cohomology, and employ integral $p$-adic Hodge theory to prove $\Lambda$-adic comparison isomorphisms between these cohomologies and the $\Lambda$-adic de Rham cohomology studied in the prequel to this paper as well as Hida's $\Lambda$-adic \'etale cohomology. As applications of our work, we provide a "cohomological" construction of the family of $(\varphi,\Gamma)$-modules attached to Hida's ordinary $\Lambda$-adic \'etale cohomology by the work of Dee, and we give a new and purely geometric proof of Hida's finitenes and control theorems. We also prove suitable $\Lambda$-adic duality theorems for each of the cohomologies we construct.