Linear Derivations Satisfying a Functional Equation on Semisimple Banach Algebras

  • Received : 2006.01.06
  • Published : 2007.03.23

Abstract

In this paper, we investigate the following: Let A be a semisimple Banach algebra. Suppose that there exists a linear derivation $f:A{\rightarrow}A$ such that the functional equation $<f(x),x>^2=0$ holds for all $x{\in}A$. Then we have $f=0$ on A.

Keywords

References

  1. Q. Deng and H. E. Bell, On derivations and commutativity in semiprime rings, Comm. Algebra, 23(1995), 3705-3713. https://doi.org/10.1080/00927879508825427
  2. B. E. Johnson and A. M. Sinclair, Continuity of derivations and a problem of Kaplansky, Amer. J. Math., 90(1968), 1067-1073. https://doi.org/10.2307/2373290
  3. B. D. Kim, Derivations of semiprime rings and noncommutative Banach algebras, Commun. Korean Math. Soc., 17(4)(2002), 607-618. https://doi.org/10.4134/CKMS.2002.17.4.607
  4. K.-H. Park, On derivations in noncommutative semiprime rings and Banach algebras, Bull. Korean Math. Soc., 42(4)(2005), 671-678. https://doi.org/10.4134/BKMS.2005.42.4.671
  5. A. M. Sinclair, Jordan homomorphisms and derivations on semisimple Banach algebras, Proc. Amer. Math. Soc., 24(1970), 209-214.
  6. I. M. Singer and J. Wermer, Derivations on commutative normed algebras, Math. Ann., 129(1955), 260-264. https://doi.org/10.1007/BF01362370
  7. M. P. Thomas, The image of a derivation is contained in the radical, Ann. of Math., 128(1988), 435-460. https://doi.org/10.2307/1971432
  8. J. Vukman, Centralizers on semiprime rings, Comment. Math. Univ. Carolin., 42(2)(2001), 237-245.