摘要Prof. Xia Daoxing investigated a class of non-normal operators. Let T be an operator in the complex Hilbert space H with the polar decomposition T=UP, here U is an isometry. Then the operator T is called (?)-quasi-hyponormal op-
2Fong Chekao,Jiang Chunlan Department of Mathematics and Statistics Carleton University Ottawa, Ontario, Canada Department of Mathematics Jilin University Jilin, 130023 China.Normal Operators Similar to Irreducible Operators[J].Acta Mathematica Sinica,English Series,1994,10(2):132-135. 被引量：1
