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Finite Rank and Small Perturbations of Linear Relations
Journal article   Peer reviewed

Finite Rank and Small Perturbations of Linear Relations

Ezzeddine Chafai and Teresa Alvarez
Mediterranean journal of mathematics, Vol.15(5), pp.1-26
01/10/2018
DOI: https://doi.org/10.1007/s00009-018-1247-0

Abstract

Mathematics Mathematics, Applied Physical Sciences Science & Technology
In this paper, we investigate the stability of regular, semi-Fredholm, finite essential ascent and finite essential descent linear relations under small and commuting finite rank perturbations as well as the behavior of the nullity, the defect and the index under such perturbations.

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