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    • Quaternionic Hilbert spaces and a von Neumann inequality 

      Alpay, D.; Kaptanoğlu, H. T. (Taylor & Francis, 2012)
      We show that Drury's proof of the generalisation of the von Neumann inequality to the case of contractive rows of N-tuples of commuting operators still holds in the quaternionic case. The arguments require a seemingly new ...