Journal of Operator Theory
Volume 86, Issue 2, Fall 2021 pp. 331-354.
Perturbation by weakly continuous forms and semigroups on Hardy space
Authors:
Wolfgang Arendt (1), Isabelle Chalendar (2), Boitumelo Moletsane (3)
Author institution:(1) Institute of Applied Analysis, University of Ulm, Helmholtzstr. 18, D-89069 Ulm, Germany
(2) LAMA, Universite Gustave Eiffel, Universite Paris Est Creteil, CNRS, F-77454 Marne-la-Vallee, France
(3) University of the Witswatersrand, Johannesburg, South Africa
Summary: In the first part of the article perturbation of a closed form by a weakly continuous form is studied. This notion of
DOI: http://dx.doi.org/10.7900/jot.2020apr30.2294
Keywords: sesquilinear coercive form, essentially coercive forms, elliptic forms, selfadjoint operators, holomorphic semigroups, asymptotically compact semigroups, Hardy space
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