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Nagy's perturbation of a non-selfadjoint operator and application to a Gribov operator in Bargmann space
  • Ines Feki,
  • Aref JERIBI,
  • Ridha Sfaxi
Ines Feki
University of Sfax
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Aref JERIBI
Universite de Sfax
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Ridha Sfaxi
University of Hafr-Al-Batin
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Peer review status:UNDER REVIEW

03 Mar 2020Submitted to Mathematical Methods in the Applied Sciences
07 Mar 2020Assigned to Editor
07 Mar 2020Submission Checks Completed
22 Mar 2020Reviewer(s) Assigned

Abstract

The purpose of the present paper is to formulate some new supplements to perturbation theory of linear operators [15] by considering a non-analytic perturbation involving more than one perturbation parameter. An application to a Gribov operator in Bargmann space illustrates the mathematical problem involved in this paper.