Computing the complexity of the relation of isometry between separable Banach spaces

• Autores: Julien Melleray
• Localización: Mathematical Logic Quarterly, ISSN 0942-5616, Vol. 53, Nº. 2, 2007, págs. 128-131
• Idioma: inglés
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• Resumen

  • We compute here the Borel complexity of the relation of isometry between separable Banach spaces, using results of Gao, Kechris [2], Mayer-Wolf [5], and Weaver [8]. We show that this relation is Borel bireducible to the universal relation for Borel actions of Polish groups. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)