Exactness and uniform embeddability of discrete groups

• Autores: Erik Guentner, Jerome Kaminker
• Localización: Journal of the London Mathematical Society, ISSN 0024-6107, Vol. 70, Nº 3, 2004, págs. 703-718
• Idioma: inglés
• DOI: 10.1112/s0024610704005897
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• Resumen

  • A numerical quasi-isometry invariant of a finitely generated group is defined whose values parametrize the difference between being uniformly embeddable in a Hilbert space and being exact.