Spectrum and numerical range of a compact set

• Autores: A. Bouchen, Mohamed Chraibi Kaadoud
• Localización: Extracta mathematicae, ISSN-e 0213-8743, Vol. 28, Nº 1, 2013, págs. 13-31
• Idioma: inglés
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• Resumen

  • In this paper, we defin the multivalued entire series in a Banach algebra A as well as the exponential, the spectrum and the numerical range of a compact set of A. We provide properties for these two sets wich are also veirfiedin the univalued case.