The distance from the holomorphically decomposable Fredholm spectrum

  • Abdelaziz Tajmouati Sidi Mohamed Ben Abdellah University Faculty of Sciences Dhar Al Mahraz
  • Mohamed Baba Mohamed Ahmed Sidi Mohamed Ben Abdellah University Faculty of Sciences Dhar Al Mahraz
  • Abdeslam El Bakkali Chouaib Doukkali University Faculty of Sciences Department of Mathematics
DOI: https://doi.org/10.5269/bspm.v38i4.40247

Resumo

The class of holomorphically decomposable Fredholm operators was introduced by A. Tajmouati and A. El Bakkali since subclass of Saphar operators. Several authors have been interested in the distance of spectrum associated with the different classes. Especially C. Schmöeger has calculated the distance of Saphar spectrum. For this reason, in this paper, we establish the distance of the holomorphically decomposable Fredholm spectrum.

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Publicado
2019-03-10
Edição
v. 38 n. 4 (2020)
Seção
Artigos

Copyright (c) 2019 Boletim da Sociedade Paranaense de Matemática

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