English

Automatic continuity of new generalized derivations

Functional Analysis 2023-09-01 v1

Abstract

Let A\mathcal{A} and B\mathcal{B} be two algebras and let nn be a positive integer. A linear mapping D:ABD:\mathcal{A} \rightarrow \mathcal{B} is called a \emph{strongly generalized derivation of order nn} if there exist families of linear mappings {Ek:AB}k=1n\{E_k:\mathcal{A} \rightarrow \mathcal{B}\}_{k = 1}^{n}, {Fk:AB}k=1n\{F_k:\mathcal{A} \rightarrow \mathcal{B}\}_{k = 1}^{n}, {Gk:AB}k=1n\{G_k:\mathcal{A} \rightarrow \mathcal{B}\}_{k = 1}^{n} and {Hk:AB}k=1n\{H_k:\mathcal{A} \rightarrow \mathcal{B}\}_{k = 1}^{n} which satisfy D(ab)=k=1n[Ek(a)Fk(b)+Gk(a)Hk(b)]D(ab) = \sum_{k = 1}^{n}\left[E_k(a) F_k(b) + G_k(a)H_k(b)\right] for all a,bAa, b \in \mathcal{A}. The purpose of this article is to study the automatic continuity of such derivations on Banach algebras and CC^{\ast}-algebras.

Keywords

Cite

@article{arxiv.2308.16367,
  title  = {Automatic continuity of new generalized derivations},
  author = {Amin Hosseini and Choonkil Park},
  journal= {arXiv preprint arXiv:2308.16367},
  year   = {2023}
}

Comments

15 pages

R2 v1 2026-06-28T12:08:52.580Z