Zobrazeno 1 - 10
of 61
pro vyhledávání: '"MEHDIPOUR, M. J."'
Let $\theta$ be an isomorphism on $L_0^{\infty} (w)^*$. In this paper, we investigate $\theta$-generalized derivations on $L_0^{\infty} (w)^*$. We show that every $\theta$-centralizing $\theta$-generalized derivation on $L_0^{\infty} (w)^*$ is a $\th
Externí odkaz:
http://arxiv.org/abs/2410.02565
In this paper, we investigate Jordan left $\alpha$-centralizer on algebras. We show that every Jordan left $\alpha$-centralizer on an algebra with a right identity is a left $\alpha$-centralizer. We also investigate this result for Banach algebras wi
Externí odkaz:
http://arxiv.org/abs/2410.02553
Let $\theta$ be a homomorphism on $L_0^\infty({\Bbb R}^+, \omega)^*$. In this paper, we study left $\theta$-derivations on $L_0^\infty({\Bbb R}^+, \omega)^*$. We show that every left $\theta$-derivation on $L_0^\infty({\Bbb R}^+, \omega)^*$ is always
Externí odkaz:
http://arxiv.org/abs/2403.16036
Autor:
Javadi, F., Mehdipour, M. J.
In this paper, we first prove a theorem by a little modification on the Lax-Milgram theorem. Then, using $K$-frames, we obtain lower and upper bounds for the results obtained from this theorem. Also, we present some methods for the characterization o
Externí odkaz:
http://arxiv.org/abs/2402.07699
Autor:
Javadi, F., Mehdipour, M. J.
In this paper, we study phase retrievable sequences and give a characterization of phase retrievability of a sequence of bounded linear operators on a Hilbert space $H$; in particular, for $H=\ell_2^d(\Bbb{C})$. We also give several approaches for co
Externí odkaz:
http://arxiv.org/abs/2308.14150
Autor:
Mehdipour, M. J., Salkhordeh, N.
Let $A$ be an algebra with a right identity. In this paper, we study $(p, q)-$centralizers of $A$ and show that every $(p, q)-$centralizer of $A$ is a two-sided centralizer. In the case where, $A$ is normed algebra, we also prove that $(p, q)-$centra
Externí odkaz:
http://arxiv.org/abs/2306.15641
In this paper, we study the types of Jordan derivations of a Banach algebra $A$ with a right identity $e$. We show that if $eA$ is commutative and semisimple, then every Jordan derivation of $ A $ is a derivation. In this case, Jordan derivations map
Externí odkaz:
http://arxiv.org/abs/2306.12529
Let $\{\frak{M} _k \} _{ k \in \mathbb{Z}} $ be a sequence of closed subspaces of Hilbert space $H$, and let $\{\Theta_k\}_{k \in \mathbb{Z}}$ be a sequence of linear operators from $H$ into $\frak{M}_k$, $k \in \mathbb{Z}$. In the definition of fusi
Externí odkaz:
http://arxiv.org/abs/2305.08182
Autor:
Ghasemi, M., Mehdipour, M. J.
In this paper, we study Jordan derivation-like maps on the $\theta-$Lau products of algebras. We characterize them and prove that under certain condition any Jordan derivation-like maps on the $\theta-$Lau products is a derivation-like map. Moreover,
Externí odkaz:
http://arxiv.org/abs/2301.13002
Autor:
Behresi, S. R., Mehdipour, M. J.
In this paper, we show that if the product $(D_1D_2, d_1d_2)$ of generalized derivations $(D_1, d_1)$ and $(D_2, d_2)$ on an algebra $A$ is a generalized derivation, then $d_1D_2$ and $d_2D_1$ map $A$ into $\hbox{rad}(A)$. Also, for generalized deriv
Externí odkaz:
http://arxiv.org/abs/2301.09139