activity
20132024
most citedHyperinner product spaces

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

collaborators
Showing 2013Show all

6 papers · 1 filter

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 be a complex Banach space with and the algebra of all bounded linear operators on . Suppose is a surjective map satisfy…