Quadratically hyponormal recursively generated weighted shifts need not be positively quadratically hyponormal

DOI10.1007/S00020-007-1505-1zbMath1134.47012OpenAlexW2084086280MaRDI QIDQ2385095

Jasang Yoon, Yiu-Tung Poon

Publication date: 11 October 2007

Published in: Integral Equations and Operator Theory (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/s00020-007-1505-1

zbMATH Keywords

recursively generated weighted shiftsquadratically hyponormalpositively quadratically hyponormal

Mathematics Subject Classification ID

Subnormal operators, hyponormal operators, etc. (47B20) Linear operators on special spaces (weighted shifts, operators on sequence spaces, etc.) (47B37)

Related Items (6)

Semi-cubic hyponormality of weighted shifts with Stampfli recursive tail ⋮ Unnamed Item ⋮ Backward extensions of recursively generated weighted shifts and quadratic hyponormality ⋮ Flat phenomena of 2-variable weighted shifts ⋮ BACKWARD 3-STEP EXTENSIONS OF RECURSIVELY GENERATED WEIGHTED SHIFTS: A RANGE OF QUADRATIC HYPONORMALITY ⋮ Quadratically hyponormal weighted shifts with recursive tail

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