Generalized derivations preserving quasinilpotent elements in Banach algebras

Cheng Kai Liu, Pao Kuei Liau

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Let A be a complex Banach algebra, let QA be the set of all quasinilpotent elements in A and let QAr be the set of all quasi-regular elements in A. We characterize generalized derivations g of A such that g(QA) ⊆ QAr provided that A has the property β. The class of Banach algebras with the property β is quite large: it includes C*-algebras, group algebras of locally compact groups, commutative Banach algebras, Banach algebras of all bounded linear operators on Banach spaces and so on. Our theorems are natural generalizations of the recent results for derivations obtained by Alaminos et al. [Bull. London Math. Soc. 46:379–384, 2014].

Original languageEnglish
Pages (from-to)1888-1908
Number of pages21
JournalLinear and Multilinear Algebra
Issue number9
Publication statusPublished - 2018 Sep 2

All Science Journal Classification (ASJC) codes

  • Algebra and Number Theory

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