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Characterizing multiplicative (generalized)-derivations on semiprime rings satisfying specific functional identities

  • Inzamam Ul Huque,
  • Hafedh Alnoghashi

摘要

Let S be a semiprime ring. A function \({\Theta }:{S}\rightarrow {S}\) Θ : S S is defined as a multiplicative (generalized)-derivation if there is a function \({\eta }\) η on S such that \({\Theta }({w}{u})={\Theta }({w}){u}+{w}{\eta }({u})\) Θ ( w u ) = Θ ( w ) u + w η ( u ) for every \({w},{u}\in {S}\) w , u S . Assume \({\tau _1},{\tau _2},{\Gamma _1},{\Gamma _2}:{S}\rightarrow {S}\) τ 1 , τ 2 , Γ 1 , Γ 2 : S S are any functions, and for every \({w},{u}\in {S},\) w , u S , \(\{{w},{u}\}^{\lambda _1}_{{\tau _1},{\tau _2}}={\tau _1}({w}){u}+{\lambda _1} {u}{\tau _2}({w}), \text { where } {\lambda _1}\in \{\pm 1\}.\) { w , u } τ 1 , τ 2 λ 1 = τ 1 ( w ) u + λ 1 u τ 2 ( w ) , where λ 1 { ± 1 } . The aim of this article is to explore the following functional identities with a non zero function \({\eta }\) η : (i) If \({\Gamma _2}\) Γ 2 is \({\tau _2}\) τ 2 -commuting and \({\Theta }(\{{w},{u}\}^{\lambda _1}_{{\tau _1},{\tau _2}})={\Gamma _1}({w})\{{w},{u}\}_{{\tau _1},{\tau _2}}^{\lambda _2} {\Gamma _2}({w})\) Θ ( { w , u } τ 1 , τ 2 λ 1 ) = Γ 1 ( w ) { w , u } τ 1 , τ 2 λ 2 Γ 2 ( w ) for every \({w},{u}\in {S},\) w , u S , and \({\lambda _1},{\lambda _2}\in \{\pm 1\}\) λ 1 , λ 2 { ± 1 } , then \({\eta }{\tau _2}\) η τ 2 is \({\tau _1}\) τ 1 -commuting. (ii) If \({\Theta }(\{{w},{u}\}^{\lambda _1}_{{\tau _1},{\tau _2}})=\{{\Theta }({w}),{u}\}^{{\lambda _2}}_{{\tau _1},{\tau _2}}\) Θ ( { w , u } τ 1 , τ 2 λ 1 ) = { Θ ( w ) , u } τ 1 , τ 2 λ 2 for every \({w},{u}\in {S}\) w , u S and \({\lambda _1},{\lambda _2}\in \{\pm 1\}\) λ 1 , λ 2 { ± 1 } , then \({\eta }{\tau _2}\) η τ 2 is \({\tau _1}\) τ 1 -commuting. (iii) If \({\Theta }(\{{w},{u}\}^{\lambda _1}_{{\tau _1},{\tau _2}})=\{{w},{\Theta }({u})\}^{{\lambda _2}}_{{\tau _1},{\tau _2}}\) Θ ( { w , u } τ 1 , τ 2 λ 1 ) = { w , Θ ( u ) } τ 1 , τ 2 λ 2 for every \({w},{u}\in {S}\) w , u S and \({\lambda _1},{\lambda _2}\in \{\pm 1\}\) λ 1 , λ 2 { ± 1 } , then \({\eta }{\tau _2}\) η τ 2 is \({\tau _2}\) τ 2 -commuting when \({\lambda _1}={\lambda _2}\) λ 1 = λ 2 ; otherwise, \({\eta }{\tau _2}\) η τ 2 is skew \({\tau _2}\) τ 2 -commuting. Furthermore, we present examples to support the hypothesis of our results.