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$\widehat {\mathcal {D}}$-modules on rigid analytic spaces III: weak holonomicity and operations

Published online by Cambridge University Press:  28 October 2021

Konstantin Ardakov
Affiliation:
Mathematical Institute, University of Oxford, OxfordOX2 6GG, UKkonstantin.ardakov@maths.ox.ac.uk
Andreas Bode
Affiliation:
Unité de mathematiques pures et appliquées, École normale supérieure de Lyon, 46 allée d'Italie, 69364Lyon, Franceandreas.bode@ens-lyon.fr
Simon Wadsley
Affiliation:
Homerton College, CambridgeCB2 8PQ, UKsjw47@cam.ac.uk

Abstract

We develop a dimension theory for coadmissible $\widehat {\mathcal {D}}$-modules on rigid analytic spaces and study those which are of minimal dimension, in analogy to the theory of holonomic $\mathcal {D}$-modules in the algebraic setting. We discuss a number of pathologies contained in this subcategory (modules of infinite length, infinite-dimensional fibres). We prove stability results for closed immersions and the duality functor, and show that all higher direct images of integrable connections restricted to a Zariski open subspace are coadmissible of minimal dimension. It follows that the local cohomology sheaves $\underline {H}^{i}_Z(\mathcal {M})$ with support in a closed analytic subset $Z$ of $X$ are also coadmissible of minimal dimension for any integrable connection $\mathcal {M}$ on $X$.

Type
Research Article
Copyright
© 2021 The Author(s). The publishing rights in this article are licensed to Foundation Compositio Mathematica under an exclusive licence

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Footnotes

The first and second authors acknowledge support from the EPSRC grant EP/L005190/1.

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