References

IDENTITY AND RANGE OF DERIVATION


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[4] A. Bachir, Generalized derivation, SUT Journal of Mathematics 40(2) (2004), 111-116.

[5] S. K. Berberian, Approximate proper values, Proc. Amer. Math. Soc. 13 (1962), 111-114.

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[7] N. Dunford and J. T. Schwartz, Linear Operators I, Pure and Appl. Math., Interscience, New York, 1958.

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[9] Y. Ho, Derivation on B(H), PhD. Thesis Indiana Univ., 1973.

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[15] K. Tanahashi, Putnam’s inequality for log-hyponormal operators, to appear.

[16] J. P. Williams, Finite operators, Proc. Amer. Math. Soc. 26 (1970), 129-136.

[17] J. P. Williams, Derivation Ranges: Open Problems, Topics in Modern Operator Theory, Birkhäuser-Verlag, (1981), 319-328.

[18] D. Xia, Spectral theory of a hyponormal operators, Operator Theory Advances and Applications 10 (1983).