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IRREGULAR HODGE FILTRATION OF SOME CONFLUENT HYPERGEOMETRIC SYSTEMS

Published online by Cambridge University Press:  24 May 2019

Alberto Castaño Domínguez
Affiliation:
Instituto de Matemáticas, Universidade de Santiago de Compostela, 15782Santiago de Compostela, Spain ([email protected])
Christian Sevenheck
Affiliation:
Fakultät für Mathematik, Technische Universität Chemnitz, 09107Chemnitz, Germany ([email protected])

Abstract

We determine the irregular Hodge filtration, as introduced by Sabbah, for the purely irregular hypergeometric ${\mathcal{D}}$-modules. We obtain, in particular, a formula for the irregular Hodge numbers of these systems. We use the reduction of hypergeometric systems from GKZ-systems as well as comparison results to Gauss–Manin systems of Laurent polynomials via Fourier–Laplace and Radon transformations.

Type
Research Article
Copyright
© Cambridge University Press 2019

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Footnotes

The authors are partially supported by the project SISYPH: ANR-13-IS01-0001-01/02 and DFG grant SE 1114/5-1.

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