References
[At] A. Athavale, On joint hyponormality of operators, Proc. Amer. Math. Soc., to appear.
[Cons] T. Constantinescu, Schur analysis of positive block-matrices, Operator Theory: Adv. Appl. 18(1986), 191–206.
[Cu] R. Curto, Joint hyponormality: A bridge between hyponormality and subnormality, preprint 1988.
[CMX] R. Curto, P. Muhly and J. Xia, Hyponormal pairs of commuting operators, Operator Theory: Adv. Appl. 35(1988), 1–22.
[F] P. Fan, A note on hyponormal weighted shifts, Proc. Amer. Math. Soc. 92(1984), 271–272.
[Jo] A. Joshi, Hyponormal polynomials of monotone shifts, Ph.D. dissertation, Purdue University, 1971.
[McCP] S. McCullough and V. Paulsen, A note on joint hyponormality, Proc. Amer. Math. Soc., to appear.
[St] J. Stampfli, Which weighted shifts are subnormal, Pacific J. Math. 17(1966), 367–379.
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Research partially supported by a grant from NSF.
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Curto, R.E. Quadratically hyponormal weighted shifts. Integr equ oper theory 13, 49–66 (1990). https://doi.org/10.1007/BF01195292
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DOI: https://doi.org/10.1007/BF01195292