A. Zamani

activity

20142023

most citedSeminorm and numerical radius inequalities of operators in semi-Hilbertian spaces

79 citations · 247 across the 24 of their papers we have counts for

collaborators

Showing 2020Show all

2 papers · 1 filter

math.FA2020

Some upper bounds for the $A$ -numerical radius of $2 \times 2$ block matrices

Qingxiang Xu, Zhongming Ye, Ali Zamani

Let $A = (A 0 0 A)$ be the $2 \times 2$ diagonal operator matrix determined by a positive bounded operator $A$ . For semi-H…

math.FA2020

On an extension of operator transforms

Ali Zamani

We introduce the $λ$ -mean transform $M_{λ} (T)$ of a Hilbert space operator $T$ as an extension of some operator transforms based on the Duggal transform $T^{D}$ by $M_λ(T) := λT + (1-λ…

Some upper bounds for the A-numerical radius of 2×2 block matrices

On an extension of operator transforms

Some upper bounds for the $A$ -numerical radius of $2 \times 2$ block matrices