R. Hosseinzadeh

activity

20132024

most citedHyperinner product spaces

2 citations · 2 across the 9 of their papers we have counts for

collaborators

9 papers

math.FA2024

Maps preserving ascent/descent of triple Jordan product

Roja Hosseinzadeh, Tatjana Petek

Let $X$ be a real or complex Banach space with $dim X \geq 3$ . We give a complete description of surjective mappings on $B (X)$ that preserve the asce…

math.FA2020

Maps completely preserving the quadratic operators

Roja Hosseinzadeh

Let $A$ and $B$ be standard operator algebras on Banach spaces $X$ and $Y$ , respectively. In this paper, we show that every bijection comple…

math.FA2016

Hyper innerproduct spaces II

Ali Taghavi, Roja Hosseinzadeh

In this paper, we extend the definition of hyperinner product defined on weak hypervector spaces with a hyperoperation scalar product to weak hypervector spaces with the hyperopera…

math.FA2013

Maps completely preserving involution

Ali Taghavi, Roja Hosseinzadeh

Let X and Y be Banach spaces with dim X greater than 3. Let A and B be standard operator algebras on X and Y. We characterize the form of maps from A onto B such that completely pr…

math.FA2013

Additive maps preserving idempotency of products or Jordan products of operators

Ali Taghavi, Roja Hosseinzadeh

Let H and K be infinite dimensional Hilbert spaces, while B(H) and B(K) denote the algebras of all linear bounded operators on H and K, respectively. We characterize the forms of a…

math.FA2013

Maps preserving the spectrum of certain products of operators

Ali Taghavi, Roja Hosseinzadeh

Let H be a complex Hilbert space, B(H) and S(H) be the spaces of all bounded operators and all self-adjoint operators on H, respectively. We give the concrete forms of the maps on…

math.FA2013★ 2 cited

Hyperinner product spaces

Ali Taghavi, Roja Hosseinzadeh, Hamid Rohi

In this paper, we introduce the concept of inner product on weak hypervector spaces and prove some results about them.

math.FA2013

Linear maps preserving the dimension of fixed points of operators

Ali Taghavi, Roja Hosseinzadeh

Let B(X) be the algebra of all bounded linear operators on a complex Banach space X with dim X greater than 3. In this paper, we characterize the forms of surjective linear maps on…

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…