arXiv subjects

Javad Laali

Publications and source records attributed to Javad Laali.

3 recordsLinked to original sources

arXiv2016

N-multipliers and their relations with n-homomorphisms

Let $A$ be a Banach algebra and $X$ be a Banach $A$-bimodule. We introduce and study the notions of $n$-multipliers and approximate local $n$-multipliers by generalizing the classical concept of multipliers from $A$ into $X$. As an algebraic result, we construct a Banach algebra consisting of $n$-multipliers on $A$ and under some mild conditions, we give a nice relation of this algebra with $n$-homomorphisms from $A$ into $\mathbb{C}$.

math.FA↗

arXiv2016

Closed ideals with bounded $Δ$-weak approximate identities in some certain Banach algebras

It is shown that a locally compact group $G$ is amenable if and only if some certain closed ideals of the Figà-Talamanca-Herz algebra $A_{p}(G)$ admit bounded $Δ$-weak approximate identities. Also, similar results are obtained for the function algebras $\mathfrak{L}A(G)$ and $C_{0}^{w}(G)$.

math.FA↗

arXiv2014

On $Δ$-weak $ϕ$-amenability of Banach algebras

Let $A$ be a Banach algebra and $ϕ\in Δ(A)\cup\{0\}$. We say that $A$ is $Δ$-weak $ϕ$-amenable if there exists an $m\in A^{**}$ such that $m(ϕ)=0$ and $m(ψ.a)=ψ(a)$ for each $ψ\in Δ(A)$ and $a\in \ker(ϕ)$. It is shown that $A$ is $Δ$-weak $ϕ$-amenable if and only if $\ker(ϕ)$ has a bounded $Δ$-weak approximate identity. We examine this notion for some algebras over amenable locally compact groups. Also we prove that every $Δ$-weak $ϕ$-amenable Banach algebra has a bounded $Δ$-weak approximate identity.

math.FA↗