Matrices of unitary moments
AbstractWe 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.
How to Cite
Dykema, K., & Juschenko, K. (2011). Matrices of unitary moments. MATHEMATICA SCANDINAVICA, 109(2), 225–239. https://doi.org/10.7146/math.scand.a-15186