Log in

Automatic continuity of dense range n-homomorphisms

  • Original Article
  • Published:
Boletín de la Sociedad Matemática Mexicana Aims and scope Submit manuscript

Abstract

In this paper, we investigate the automatic continuity of n-homomorphisms and n-Jordan homomorphisms between Banach algebras, and generalize some well-known results concerning the automatic continuity of homomorphisms and Jordan homomorphisms. In particular, we generalize a Rickart’s theorem for dense range n-homomorphisms with the additional hypothesis that the Banach algebra \({\mathcal {A}}\) is unital.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Subscribe and save

Springer+ Basic
EUR 32.99 /Month
  • Get 10 units per month
  • Download Article/Chapter or Ebook
  • 1 Unit = 1 Article or 1 Chapter
  • Cancel anytime
Subscribe now

Buy Now

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Bonsall, F.F., Duncan, J.: Complete normed algebra. Springer-Verlag, New York (1973)

    Book  Google Scholar 

  2. Bra\(\breve{c}\)i\(\breve{c}\), J., Moslehian, M. S.: On automatic continuity of \(3\)-homomorphisms on Banach algebras, Bull. Malay. Math. Sci. Soc., 30(2), 195–200 (2007)

  3. Dales, H. G.: Banach Algebras and Automatic Continuity, London Math. Soc., 24, Clarendon Press, Oxford, (2000)

  4. Gordji, M.E., Jabbari, A., Karapinar, E.: Automatic continuity of surjective \(n\)-homomorphisms on Banach algebras. Bull. Iranian Math. Soc. 41(5), 1207–1211 (2015)

    MathSciNet  MATH  Google Scholar 

  5. Hejazian, Sh., Mirzavaziri, M., Moslehian, M.S.: \(n\)-Homomorphisms. Bull. Iranian Math. Soc. 31(1), 13–23 (2005)

    MathSciNet  MATH  Google Scholar 

  6. Herstein, I.N.: Jordan homomorphisms. Trans. Amer. Math. Soc. 81(1), 331–341 (1956)

    Article  MathSciNet  Google Scholar 

  7. Honari, T.G., Shayanpour, H.: Automatic continuity of \(n\)-homomorphisms between Banach algebras. Quest. Math. 33(2), 189–196 (2010)

    Article  MathSciNet  Google Scholar 

  8. Johnson, B.E.: The uniqueness of the (complete) norm topology. Bull. Amer. Math. Soc. 73, 537–539 (1967)

    Article  MathSciNet  Google Scholar 

  9. Palmer, T.: Banach Algebras and the General Theory of \(*\)-Algebras, vol. I. Cambridge Univ. Press, Cambridge (1994)

    Book  Google Scholar 

  10. Ransford, T.J.: A short proof of Johnson’s uniqueness of norm theorem. Bull. London Math. Soc. 21(5), 487–488 (1989)

    Article  MathSciNet  Google Scholar 

  11. Rickart, C.E.: The uniqueness-of-norm problem in Banach algebras. Ann. Math. 51, 615–628 (1950)

    Article  MathSciNet  Google Scholar 

  12. Runde, V.: An epimorphism from a \(C^*\)-algebra is continuous on the center of its domain. J. Reine Angew. Math. 439, 93–102 (1993)

    MathSciNet  MATH  Google Scholar 

  13. Zelazko, W.: A characterization of multiplicative linear functionals in complex Banach algebras. Studia Math. 30, 83–85 (1968)

    Article  MathSciNet  Google Scholar 

  14. Zivari-Kazempour, A.: A characterization of \(3\)-Jordan homomorphism on Banach algebras. Bull. Aust. Math. Soc. 93(2), 301–306 (2016)

    Article  MathSciNet  Google Scholar 

  15. Zivari-Kazempour, A.: Automatic continuity of \(n\)-Jordan homomorphisms on Banach algebras. Commun. Korean Math. Soc. 33(1), 165–170 (2018)

    MathSciNet  MATH  Google Scholar 

  16. Zivari-Kazempour, A.: A characterization of \(n\)-Jordan homomorphisms and automatic continuity of \(3\)-Jordan homomorphisms on Banach algebras. Iran. J. Sci. Technol. Tran. Sci. 44(1), 213–218 (2020)

    Article  MathSciNet  Google Scholar 

  17. Zivari-Kazempour, A.: Automatic continuity of almost \(3\)-homomorphisms and almost \(3\)-Jordan homomorphisms. Adv. Operator Theory 5(4), 1340–1349 (2020)

    Article  MathSciNet  Google Scholar 

  18. Zivari-Kazempour, A.: Automatic continuity of almost \(n\)-multiplicative linear functionals, Sahand Commun. Math. Anal., Accepted

  19. Zivari-Kazempour, A., Valaei, M.: Characterization of \(n\)-Jordan homomorphisms on rings. Tamkang J. Math. 53(1), 89–96 (2022)

    MathSciNet  MATH  Google Scholar 

Download references

Acknowledgements

The authors gratefully acknowledge the helpful comments of the anonymous referees.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Abbas Zivari-Kazempour.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Zivari-Kazempour, A., Mewomo, O.T. Automatic continuity of dense range n-homomorphisms. Bol. Soc. Mat. Mex. 28, 53 (2022). https://doi.org/10.1007/s40590-022-00449-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s40590-022-00449-0

Keywords

Mathematics Subject Classification

Navigation