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This research was supported in part by a Foundation from Academy of Sciences of China
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Dechao, Z. On hyponormal weighted unilateral shift of multiplicityk(0<K<+∞). Acta Mathematica Sinica 3, 77–81 (1987). https://doi.org/10.1007/BF02564947
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DOI: https://doi.org/10.1007/BF02564947