“…Pincus, in the articles [9], [10], and [11], and Carey and Pincus, in [2], [3], [1], [5], and [6], create a complete unitary invariant for pure hyponormal operators with trace-class self-commutator which they call the mosaic. This mosaic is created by studying an operatorial phase shift which is based on the decomposition of the hyponormal operator into its real and imaginary parts.…”