Note on operational quantities and Mil'man isometry spectrum

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

ISSN: 1130-4723

Year of publication: 1991

Volume: 3

Issue: 1

Pages: 103-111

Type: Article

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More publications in: Revista de la Academia Canaria de Ciencias: = Folia Canariensis Academiae Scientiarum

Abstract

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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