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Perturbation of minimum attaining operators
Published in Tusi Mathematical Research Group (TMRG)
2018
Volume: 3
   
Issue: 3
Pages: 473 - 490
Abstract
We prove that the minimum attaining property of a bounded linear operator on a Hilbert space H whose minimum modulus lies in the discrete spectrum, is stable under small compact perturbations. We also observe that given a bounded operator with strictly positive essential minimum modulus, the set of compact perturbations which fail to produce a minimum attaining operator is smaller than a nowhere dense set. In fact, it is a porous set in the ideal of all compact operators on H. Further, we try to extend these stability results to perturbations by all bounded linear operators with small norm and obtain subsequent results. © 2016 by the Tusi Mathematical Research Group.
About the journal
JournalAdvances in Operator Theory
PublisherTusi Mathematical Research Group (TMRG)
ISSN2538225X