V. Darvish

activity

20132019

most citedAdditivity of maps preserving products

A P \pm P A^{*}

C^{*}

-algebras

3 citations · 5 across the 13 of their papers we have counts for

collaborators

Showing 2013Show all

4 papers · 1 filter

math.FA2013

Strong convergence of a new composite iterative method for equilibrium problems and fixed point problems in Hilbert spaces

Vahid Darvish, S. M. Vaezpour

In this paper, first we introduce a new mapping for finding a common fixed point of an infinite family of nonexpansive mappings then we consider iterative method for finding a comm…

math.FA2013

Maps preserving the fixed points of products of operators

Ali Taghavi, Roja Hosseinzadeh, Vahid Darvish

Let $X$ be a complex Banach space with $dim X \geq 3$ and $B (X)$ the algebra of all bounded linear operators on $X$ . Suppose $ϕ : B (X) ⟶ B (X)$ is a surjective map satisfy…

math.FA2013

Convergence of general composite iterative method for infinite family of nonexpansive mappings in Hilbert spaces

Vahid Darvish, S. M. Vaezpour

In this paper by using $W_{n}$ -mapping, we introduce a composite iterative method for finding a common fixed point for infinite family of nonexpansive mappings and a solution of a…

math.FA2013

Some results on singular value inequalities of normal operators

Ali Taghavi, Vahid Darvish

Let $x = a + ib$ be a complex number, so we have the following inequality $(1/ 2) ∣ a + b ∣ \leq ∣ x ∣ \leq ∣ a ∣ + ∣ b ∣$ We give an operator version of above inequality. Also we obtain some…