Shahrood University of Technology Journal of Algebraic Systems 2345-5128 13 3 2025 11 01 STRUCTURED CONDITION PSEUDOSPECTRA AND STRUCTURED ESSENTIAL CONDITION PSEUDOSPECTRA OF BOUNDED LINEAR OPERATORS ON ULTRAMETRIC BANACH SPACES 95 111 3128 10.22044/jas.2024.13586.1756 EN Jawad Ettayb Ministry of National Education, Regional Academy of Education and Training of Casablanca Settat, Hammam Al Fatawaki High School, Had Soualem, Morocco. Journal Article 2023 09 10 In this paper, we introduce and study the structured condition pseudospectra and the structured essential condition pseudospectra of bounded linear operators on ultrametric Banach spaces. We establish a characterization of the structured condition pseudospectrum of continuous linear operators and we give a relationship between the structured condition pseudospectrum and the structured pseudospectrum of continuous linear operators on ultrametric Banach spaces. Many characterizations of the structured essential condition pseudospectrum of bounded linear operators and examples are given. Ultrametric Banach spaces pseudospectra condition pseudospectra bounded linear operators https://jas.shahroodut.ac.ir/article_3128_333be5af9f22065b4a9dd7173a6faf13.pdf