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We compare the perturbation classes for closed semi-Fredholm and Fredholm operators with dense domain acting between Banach spaces with the corresponding perturbation classes for bounded semi-Fredholm and Fredholm operators. We… Click to show full abstract
We compare the perturbation classes for closed semi-Fredholm and Fredholm operators with dense domain acting between Banach spaces with the corresponding perturbation classes for bounded semi-Fredholm and Fredholm operators. We show that they coincide in some cases, but they are different in general. We describe several relevant examples and point out some open problems.
Keywords:
classes problem;
closed operators;
fredholm;
perturbation;
problem closed;
perturbation classes
Journal Title: Filomat
Year Published: 2017
Link to full text (if available)
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Journal Title: Filomat
Year Published: 2017
Link to full text (if available)
Share on Social Media: Sign Up to like & get
recommendations!