quasicentral

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quasicentral (not comparable)

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- 2016, Dan-Virgil Voiculescu, “A remark about supramenability and the Macaev norm”, in arXiv‎^[1]:
  The condition is equivalent to the existence of quasicentral approximate unit with respect to the Macaev norm relative to the left regular representation of the group and has been studied by the author in connection with perturbation questions for Hilbert space operators.