Research Article

The Convergence of Some Spectral Characteristics on the Convergent Series

Volume: 10 Number: 2 November 30, 2023
EN TR

The Convergence of Some Spectral Characteristics on the Convergent Series

Abstract

In this study, convergence properties of spectral, numerical and Crawford gap functions via convergences of Hilbert space operator series in difference and ratio cases are investigated. Obtained results have been applied to some classes continuous functions of the operators.

Keywords

Thanks

The author sincerely thanks to the editor and the referees for helpful suggestions.

References

  1. Gelfand, M. (1941). Normierte ringe. Matematicheskii Sbornik, 9(51), 3-24.
  2. Halmos, P. R. (1982). A Hilbert Space Problem Book. Springer-Verlag, New York.
  3. Yamazaki, T. (2007). On upper and lower bounds of the numerical radius and equality condition. Studia Math., 178, 83-89.
  4. Gustafson, K. E., & Rao, D. K. M. (1997). Numerical Range: The Field of Values of Linear Operators and Matrices. Springer, New York.
  5. Bani-Domi, W., & Kittaneh, F. (2021). Refined and generalized numerical radius inequalities for 2x2 operator matrices. Linear Algebra Appl., 624, 364-386.
  6. Bhunia, P., & Paul, K. (2021). New upper bounds for the numerical radius of Hilbert space operators. Bull. Sci. Math., 167, 1-11.
  7. Bhunia, P., Paul K., & Nayak, R. K. (2021). Sharp inequalities for the numerical radius of Hilbert space operators and operator matrices. Math. Inequal. Appl., 24, 167-183.
  8. Kittaneh, F. (2003). A numerical radius inequality and an estimate for the numerical radius of the Frobenius companion matrix. Studia Math., 158, 11-17.

Details

Primary Language

English

Subjects

Approximation Theory and Asymptotic Methods

Journal Section

Research Article

Publication Date

November 30, 2023

Submission Date

March 9, 2023

Acceptance Date

May 29, 2023

Published in Issue

Year 2023 Volume: 10 Number: 2

APA
Otkun Çevik, E. (2023). The Convergence of Some Spectral Characteristics on the Convergent Series. Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi, 10(2), 423-429. https://doi.org/10.35193/bseufbd.1262386
AMA
1.Otkun Çevik E. The Convergence of Some Spectral Characteristics on the Convergent Series. Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi. 2023;10(2):423-429. doi:10.35193/bseufbd.1262386
Chicago
Otkun Çevik, Elif. 2023. “The Convergence of Some Spectral Characteristics on the Convergent Series”. Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi 10 (2): 423-29. https://doi.org/10.35193/bseufbd.1262386.
EndNote
Otkun Çevik E (November 1, 2023) The Convergence of Some Spectral Characteristics on the Convergent Series. Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi 10 2 423–429.
IEEE
[1]E. Otkun Çevik, “The Convergence of Some Spectral Characteristics on the Convergent Series”, Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi, vol. 10, no. 2, pp. 423–429, Nov. 2023, doi: 10.35193/bseufbd.1262386.
ISNAD
Otkun Çevik, Elif. “The Convergence of Some Spectral Characteristics on the Convergent Series”. Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi 10/2 (November 1, 2023): 423-429. https://doi.org/10.35193/bseufbd.1262386.
JAMA
1.Otkun Çevik E. The Convergence of Some Spectral Characteristics on the Convergent Series. Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi. 2023;10:423–429.
MLA
Otkun Çevik, Elif. “The Convergence of Some Spectral Characteristics on the Convergent Series”. Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi, vol. 10, no. 2, Nov. 2023, pp. 423-9, doi:10.35193/bseufbd.1262386.
Vancouver
1.Elif Otkun Çevik. The Convergence of Some Spectral Characteristics on the Convergent Series. Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi. 2023 Nov. 1;10(2):423-9. doi:10.35193/bseufbd.1262386