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math.FA2023
Left (right) pseudospectrum and left (right) condition pseudospectrum of bounded linear operators on ultrametric Banach spaces
Jawad Ettayb
In this note, we introduce and study the left (right) pseudospectrum and left (right) condition pseudospectrum of bounded linear operators on ultrametric Banach spaces. We prove so…
math.FA2023
Condition pseudospectrum of operator pencils on non-archimedean Banach spaces
Jawad Ettayb
This paper deals with the condition pseudospectrum and essential condition pseudospectrum of operator pencils on n.a Banach spaces. We give a characterization of the condition pseu…
math.FA2022
A Hille-Yoshida-Phillips theorem for discrete semigroups on complete ultrametric locally convex spaces
Jawad Ettayb
Let be a complete Hausdorff locally convex space over let such that is analytic on its domain. In this paper, we give a nec…