H. Najafi

activity

20112024

most citedOperator maps of Jensen-type

9 citations · 11 across the 8 of their papers we have counts for

collaborators

Showing 2012Show all

2 papers · 1 filter

math.FA2012★ 2 cited

An extension of the Lowner-Heinz inequality

Mohammad Sal Moslehian, Hamed Najafi

We extend the celebrated Löwner--Heinz inequality by showing that if $A, B$ are Hilbert space operators such that $A > B \geq 0$ , then A^r - B^r \geq ||A||^r-(||A||- \frac{1}{||(A-…

math.OA2012

On the binary relation $\leq_{u}$ on self-adjoint Hilbert space operators

M. S. Moslehian, S. M. S. Nabavi Sales, H. Najafi

Given self-adjoint operators $A, B \in B (H)$ it is said $A \leq_{u} B$ whenever $A \leq U^{*} B U$ for some unitary operator $U$ . We show that $A \leq_{u} B$ if and only if $f…

An extension of the Lowner-Heinz inequality

On the binary relation ≤u​ on self-adjoint Hilbert space operators

On the binary relation $\leq_{u}$ on self-adjoint Hilbert space operators