Browder essential approximate pseudospectrum and defect pseudospectrum on a Banach space

• Aymen Ammar ; Aref Jeribi ; Kamel Mahfoudhi ^[1]
  1. [1] University of Sfax

     University of Sfax

     Túnez

     
• Localización: Extracta mathematicae, ISSN-e 0213-8743, Vol. 34, Nº 1, 2019, págs. 29-40
• Idioma: inglés
• Enlaces
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• Resumen

  • In this paper, we introduce and study the Browder essential approximate pseudospectrum and the Browder essential defect pseudospectrum of bounded linear operators on a Banach space. Moreover, we characterize these spectra and will give some results concerning the stability of them under suitable perturbations.