21 citations · 51 across the 15 of their papers we have counts for
18 papers
Characterization of Lie centralizable mappings on B(X)
Behrooz Fadaee, Hoger Ghahramani, Ayyoub Majidi
Assume that B(X) is the algebra of all bounded linear operators on a complex Banach space X, and let W in B(X) is such that cl(W(X)) is not equal to X or W=zI, where z is a complex…
Jordan and Lie derivations of -Johnson amenable Banach algebras
Hoger Ghahramani, Parvin Zamani
Let U be a -Johnson amenable Banach algebra in which is a non-zero multiplicative linear functional on U. Suppose that X is a Banach U-bimodule such that for all…
On Lie n-centralizers, n-commuting linear maps and related mappings
Hoger Ghahramani
In this article, we consider several local conditions under which linear mappings on algebras act like Lie n-centralizers and we study these linear mappings, Lie n-centralizers and…
Symmetrically pseudo-amenable Banach algebras
Hoger Ghahramani, Parvin Zamani
We introduce and study a new notion of amenability called symmetric pseudo-amenability. We obtain some properties of symmetrically pseudo-amenable Banach algebras and with examples…
Ternary derivations of nest algebras
Hoger Ghahramani
Suppose that is a (real or complex) Banach space, , and is a nest on , with each in is complemented in whenever . A…
Relative amenability of Banach algebras
Hoger Ghahramani, Wania Khodakarami, Esmaeil Feizi
Let A be a Banach algebra and I be a closed ideal of A. We say that A is amenable relative to I, if A/I is an amenable Banach algebra. We study the relative amenability of Banach a…
Linear maps behaving like derivations or anti-derivations at orthogonal elements on C*-algebras
Behrooz Fadaee, Hoger Ghahramani
Let A be a C*-algebra and d from A into A** be a continuous linear map. We assume that d acts like derivation or anti-derivation at orthogonal elements for several types of orthogo…
Automatic continuity of Some linear mappings from certain products of Banach algebras
Hamid Farhadi, Eghbal Ghaderi, Hoger Ghahramani
Let and be Banach algebras and be a nonzero character on . Then the \textit{Lau product Banach algebra} $\mathcal{A}\times_θ\mathcal{U}…
Characterizing derivations and anti-derivations on group algebras through orthogonality
Hoger Ghahramani
Let L^1(G) and M(G) be group algebra and measure algebra of a locally compact group G, respectively and D:L^1(G)-->M(G) be a continuous linear map. We consider D behaving like deri…
Left Ideal Preserving Maps on Triangular Algebras
Hoger Ghahramani
Let A be a unital algebra over a commutative unital ring R. We say that A is a SLIP algebra if every R-linear map on A that leaves invariant every left ideal of A is a left multipl…
Derivations on semidirect products of Banach algebras
Hamid Farhadi, Hoger Ghahramani
Let A and U be Banach algebras such that U is also a Banach A- bimodule with compatible algebra operations, module actions and norm. By defining an approprite action, we turn l1-di…
2n-Weak module amenability of semigroup algebras
Hoger Ghahramani
Let be an inverse semigroup with the set of idempotents . We prove that the semigroup algebra is always -weakly module amenable as an -module,…
Characterizations of left derivable maps at non-trivial idempotents on nest algebras
Hoger Ghahramani
Let be a nest algebra associated with the nest on a (real or complex) Banach space $\X$. Suppose that there exists a non-trivial idempotent $P\in A…
Characterizing Jordan centralizers and Jordan generalized derivations on triangular rings through zero products
Hoger Ghahramani
Let $\T$ be a -torsion free triangular ring and let $φ:\T\rightarrow \T$ be an additive map. We prove that if $\A φ(\B)+φ(\B)\A=0$ whenever $\A,\B\in \T$ are such that $\A\B=\B\…
Continuous linear maps on reflexive algebras behaving like Jordan left derivations at idempotent-product elements
B. Fadaee, H. Ghahramani
Let $\A$ be a Banach algebra with unity and $ \M $ be a unital Banach left $ \A $-module. let $ δ: \A \rightarrow \M$ be a continuous linear map with the property that…
On derivations and Jordan derivations through zero products
Hoger Ghahramani
Let $\A$ be a unital complex (Banach) algebra and $\M$ be a unital (Banach) $\A$-bimodule. The main results describe (continuous) derivations or Jordan derivations $D:\A\rightarrow…
Jordan derivations on block upper triangular matrix algebras
Hoger Ghahramani
We provide that any Jordan derivation from the block upper triangular matrix algebra $\T = \T(n_{1},n_{2}, \cdots, n_{k})\subseteq M_{n}(\mathbb{\C})$ into a -torsion free unita…
Characterizing Jordan derivations of matrix rings through zero products
Hoger Ghahramani
Let $\Mn$ be the ring of all matrices over a unital ring , let be a 2-torsion free unital $\Mn$-bimodule and let $D:\Mn\rightarrow \mathcal{…