Browsing Mathematics (MA) by Subject "Subnormal Operators"

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    • Normal Spectrum of a Subnormal Operator 

      Kumar, Sumit (2018-03-21)
      Let H be a separable Hilbert space over the complex field. The class S := {N|M : N is normal on H and M is an invariant subspace for Ng of subnormal operators. This notion was introduced by Halmos. The minimal normal ...

    • Subnormality and Moment Sequences 

      Hota, Tapan Kumar (2018-03-07)
      In this report we survey some recent developments of relationship between Hausdorff moment sequences and subnormality of an unilateral weighted shift operator. Although discrete convolution of two Haudorff moment sequences ...