Measures of noncompactness and upper semi-Fredholm perturbation theorems
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- by Fernando Galaz-Fontes PDF
- Proc. Amer. Math. Soc. 118 (1993), 891-897 Request permission
Abstract:
We introduce the concept of a perturbation function, which allows us to give a general approach to the question of obtaining perturbation theorems for upper semi-Fredholm operators. Also, we show that the usual measures of noncompactness of continuous linear operators, as well as other related quantities, are perturbation functions.References
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Additional Information
- © Copyright 1993 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 118 (1993), 891-897
- MSC: Primary 47A55; Secondary 47A53, 47H09
- DOI: https://doi.org/10.1090/S0002-9939-1993-1151810-3
- MathSciNet review: 1151810