Matrices of unitary moments

• Autores: Kate Juschenko, Ken Dykema
• Localización: Mathematica scandinavica, ISSN 0025-5521, Vol. 109, Nº 2, 2011, págs. 225-239
• Idioma: inglés
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• Resumen

  • We investigate certain matrices composed of mixed, second-order moments of unitaries. The unitaries are taken from C∗-algebras with moments taken with respect to traces, or, alternatively, from matrix algebras with the usual trace. These sets are of interest in light of a theorem of E. Kirchberg about Connes' embedding problem.