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On a Partial q-Analog of a Singularly Perturbed Problem with Fuchsian and Irregular Time Singularities

Stephane Malek ()

Abstract and Applied Analysis, 2020, vol. 2020, 1-32

Abstract: A family of linear singularly perturbed difference differential equations is examined. These equations stand for an analog of singularly perturbed PDEs with irregular and Fuchsian singularities in the complex domain recently investigated by A. Lastra and the author. A finite set of sectorial holomorphic solutions is constructed by means of an enhanced version of a classical multisummability procedure due to W. Balser. These functions share a common asymptotic expansion in the perturbation parameter, which is shown to carry a double scale structure, which pairs q -Gevrey and Gevrey bounds.

Date: 2020
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DOI: 10.1155/2020/7985298

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