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Operational calculus and integral transforms for groups with finite propagation speed

Operational calculus and integral transforms for groups with finite propagation speed AbstractLet A be the generator of a strongly continuous cosine family (cos⁡(t⁢A))t∈ℝ{(\cos(tA))_{t\in\mathbb{R}}}on a complex Banach space E. The paper develops an operational calculus for integral transforms and functions of A using the generalized harmonic analysis associated to certain hypergroups. It is shown that characters of hypergroups which have Laplace representations give rise to bounded operators on E. Examples include the Mellin transform and the Mehler–Fock transform. The paper usesfunctional calculus for the cosine family cos⁡(t⁢Δ){\cos(t\sqrt{\Delta})}which isassociated with waves that travel at unit speed. The main results include an operational calculus theorem for Sturm–Liouville hypergroups with Laplace representation as well as analogues to the Kunze–Stein phenomenon in the hypergroup convolution setting. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advances in Pure and Applied Mathematics de Gruyter

Operational calculus and integral transforms for groups with finite propagation speed

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References (38)

Publisher
de Gruyter
Copyright
© 2017 Walter de Gruyter GmbH, Berlin/Boston
ISSN
1869-6090
eISSN
1869-6090
DOI
10.1515/apam-2015-0049
Publisher site
See Article on Publisher Site

Abstract

AbstractLet A be the generator of a strongly continuous cosine family (cos⁡(t⁢A))t∈ℝ{(\cos(tA))_{t\in\mathbb{R}}}on a complex Banach space E. The paper develops an operational calculus for integral transforms and functions of A using the generalized harmonic analysis associated to certain hypergroups. It is shown that characters of hypergroups which have Laplace representations give rise to bounded operators on E. Examples include the Mellin transform and the Mehler–Fock transform. The paper usesfunctional calculus for the cosine family cos⁡(t⁢Δ){\cos(t\sqrt{\Delta})}which isassociated with waves that travel at unit speed. The main results include an operational calculus theorem for Sturm–Liouville hypergroups with Laplace representation as well as analogues to the Kunze–Stein phenomenon in the hypergroup convolution setting.

Journal

Advances in Pure and Applied Mathematicsde Gruyter

Published: Oct 1, 2017

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