Note on operational quantities and Mil'man isometry spectrum

  1. González Ortiz, Manuel
  2. Martinón Cejas, Antonio
Zeitschrift:
Revista de la Academia Canaria de Ciencias: = Folia Canariensis Academiae Scientiarum

ISSN: 1130-4723

Datum der Publikation: 1991

Ausgabe: 3

Nummer: 1

Seiten: 103-111

Art: Artikel

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Andere Publikationen in: Revista de la Academia Canaria de Ciencias: = Folia Canariensis Academiae Scientiarum

Zusammenfassung

In this note, using Mil 'man isometry spectrum and some Tsirelson-like examples of Banach spaces, due to Figiel and Johnson, and Schlumprecht, we show that two operational quantities that have been used to characterize upper semi-Fredholm operators, are not equivalent.

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