DOI QR코드

DOI QR Code

A FIXED POINT APPROACH TO THE STABILITY OF QUINTIC MAPPINGS IN QUASI β-NORMED SPACES

  • Koh, Heejeong (Department of Mathematical Education Dankook University)
  • Received : 2013.07.15
  • Accepted : 2013.09.27
  • Published : 2013.11.15

Abstract

We investigate the general solution of the following functional equation and the generalized Hyers-Ulam-Rassias stability problem in quasi ${\beta}$-normed spaces and then the stability by using alternative fixed point method for the following quintic function $f:X{\rightarrow}Y$ such that f(3x+y)+f(3x-y)+5[f(x+y)+f(x-y)]=4[f(2x+y)+f(2x-y)]+2f(3x)-246f(x), for all $x,y{\in}X$.

Keywords

References

  1. T. Aoki, On the stability of the linear transformation in Banach spaces, J. Math. Soc. Japan 2 (1950), 64-66. https://doi.org/10.2969/jmsj/00210064
  2. J. H. Bae and W. G. Park, On the generalized Hyers-Ulam-Rassias stability in Banach modules over a C*-algebra, J. Math. Anal. Appl. 294 (2004), 196-205. https://doi.org/10.1016/j.jmaa.2004.02.009
  3. Y. Benyamini and J. Lindenstrauss, Geometric Nonlinear Functional Analysis, vol. 1, Colloq. Publ. vol.48, Amer. Math. Soc., Providence, (2000).
  4. I. G. Cho, D. Kang, and H. Koh, Stability Problems of Quintic Mappings in Quasi-fi-Normed Spaces, Journal of Inequalities and Applications, Article ID 368981, 9 pages, 2010 (2010).
  5. S. Czerwik, On the stability of the quadratic mapping in normed spaces, Abh. Math. Sem. Univ. Hamburg 62 (1992), 59-64. https://doi.org/10.1007/BF02941618
  6. S. Cherwik, Functional Equations and Inequalities in Several Variables, World Scientific Publ.Co., New Jersey, London, Singapore, Hong Kong, (2002).
  7. Z. Gajda, On the stability of additive mappings, Internat. J. Math. Math. Sci. 14 (1991), 431-434. https://doi.org/10.1155/S016117129100056X
  8. M. E. Gordji, Y. J. Cho, M. B. Ghaemi, and H. Majani, Approximately quintic and sextic mappings formn r-divisible groups into into Serstnev Probabilistic Banach Spaces: Fixed Point Method , Disc. Dynam. in Natural and society, Article ID 572062, 16 pages, 2011 (2011).
  9. D. H. Hyers, On the stability of the linear equation, Proc. Nat. Acad. Sci. U.S.A. 27 (1941), 222-224. https://doi.org/10.1073/pnas.27.4.222
  10. D. H. Hyers and Th. M. Rassias, Approximate homomorphisms, Aequationes Mathematicae, 44 (1992), 125-153. https://doi.org/10.1007/BF01830975
  11. D. H. Hyers, G. Isac, and Th. M. Rassias, Stability of Functional Equations in Several Variables, Birkhauser, Boston, Basel, Berlin, 1998.
  12. S. M. Jung, Hyers-Ulam-Rassias Stability of Functional Equations in Mathematical Analysis, Hadronic Press,Inc., Florida, 2001.
  13. B. Margolis and J. B. Diaz, A fixed point theorem of the alternative for con-tractions on a generalized complete metric space, Bull. Amer. Math. Soc. 74 (1968), 305-309. https://doi.org/10.1090/S0002-9904-1968-11933-0
  14. C. Park, J. L. Cui, and M. E. Gordji, Orthogonality and quintic functional equations, Acta Mathematica Sinica, English Series, 29 (2013), no. 7, 1381-1390.
  15. J. M. Rassias and H. M. Kim Generalized Hyers.Ulam stability for general additive functional equations in quasi-fi-normed spaces, J. Math. Anal. Appl. 356 (2009), 302-309. https://doi.org/10.1016/j.jmaa.2009.03.005
  16. Th. M. Rassias, On the stability of the linear mapping in Banach spaces, Proc. Amer. Math. Soc. 72 (1978), 297-300. https://doi.org/10.1090/S0002-9939-1978-0507327-1
  17. Th. M. Rassias, On the stability of functional equations and a problem of Ulam, Acta Applicandae Mathematicae, 62 (2000), 23-130. https://doi.org/10.1023/A:1006499223572
  18. Th. M. Rassias, On the stability of functional equations in Banach spaces, J. Math. Anal. Appl. 251 (2000), 264-284. https://doi.org/10.1006/jmaa.2000.7046
  19. Th. M. Rassias and P. Semrl On the Hyers-Ulam stability of linear mappings, J. Math. Anal. Appl. 173 (1993), 325-338. https://doi.org/10.1006/jmaa.1993.1070
  20. Th. M. Rassias and K. Shibata, Variational problem of some quadratic functions in complex analysis, J. Math. Anal. Appl. 228 (1998), 234-253. https://doi.org/10.1006/jmaa.1998.6129
  21. S. Rolewicz, Metric Linear Spaces, Reidel/PWN-Polish Sci. Publ., Dordrecht, 1984.
  22. I. A. Rus, Principles and Appications of Fixed Point Theory, Ed. Dacia, Cluj-Napoca, 1979 (in Romanian).
  23. S. M. Ulam, Problems in Morden Mathematics, Wiley, New York, 1960.
  24. T. Z. Xu, J. M. Rassias, and W. X. Xu, A generalized mixed quadratic-quartic functional equation, Bull. Malaysian Math. Scien. Soc. 35 (2012), no. 3, 633-649.