Abstract
In this paper, we introduce and study the essential pseudospectra of closed, densely defined linear operators in the Banach space. We start by giving the definition and we investigate the characterization, the stability and some properties of these essential pseudospectra.
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Ammar, A., Jeribi, A. A characterization of the essential pseudospectra on a Banach space. Arab. J. Math. 2, 139–145 (2013). https://doi.org/10.1007/s40065-012-0065-7
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DOI: https://doi.org/10.1007/s40065-012-0065-7