Some Results on Quasi-Hyponormal Operators

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Authors

  • N. C. Shah
     Department of Mathematics, Ahmedabad Science College, Ahmedabad 380001 ,IN
  • I. H. Sheth
     Department of Mathematics, Gujarat University, Ahmedabad, 380009 ,IN

Abstract

During the last decade, two new classes of linear operators namely hyponormal operators and paranormal operators (or operators of class (N)) are studied intensively. Recently a new class of operators is defined [3].

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Published

1975-12-01

How to Cite

Shah, N. C., & Sheth, I. H. (1975). Some Results on Quasi-Hyponormal Operators. The Journal of the Indian Mathematical Society, 39(1-4), 285–291. Retrieved from http://www.informaticsjournals.com/index.php/jims/article/view/16653

Issue

Volume 39, Issue 1-4, March-December 1975

Section

Articles

License

Copyright (c) 1975 N. C. Shah, I. H. Sheth

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

 

References

T. ANDO, Operators with a norm condition (Preprint).

S.K. BERBERIAN, Introduction to Hilbert Space. Oxford University Press, 1961.

SHILA DEVI, A new class of operators. Abstract of Paper No. 166. Indian Mathematical Society Conference, 1972.

T.V. FURUTA, On the class of paranormal operators. Proc. Japan Academy 34, (1967), 594-98.

VASILY ISTRATESCU, T. YOSHINO, T. SAITO, On a class of operators. Tbhoku Math. Jour. 18, (1966),410-13.

C.P. PUTNAM, Commutation properties of Hilbert Space Operators and related topics, Springer-Verlag, Berlin, 1967.

I.H. SHETH, Quasi-hyponormal operators (To appear in Revue Rouma de Math et appli.).

J.G. STAMPFLI, Hyponormal operators, Pacific J. Math. 12, (1963), 1453-58.

Extreme points of the numerical range of a hyponormal operator, Michigan Math. J. 13 (1966), 87-89.