79 citations · 210 across the 18 of their papers we have counts for
4 papers · 1 filter
Seminorm and numerical radius inequalities of operators in semi-Hilbertian spaces
M. S. Moslehian, Q. Xu, A. Zamani
Let be a positive bounded operator on a Hilbert space . The semi-inner product ${\langle x, y\rangle}_A := \langle Ax, y\ra…
Numerical radius inequalities concerning with algebraic norms
A. Zamani, M. S. Moslehian, Q. Xu +1
We give an expression for a generalized numerical radius of Hilbert space operators and then apply it to obtain upper and lower bounds for the generalized numerical radius. We also…
Halmos' two projections theorem for Hilbert -module operators and the Friedrichs
Wei Luo, Mohammad Sal Moslehian, Qingxiang Xu
Halmos' two projections theorem for Hilbert space operators is one of the fundamental results in operator theory. In this paper, we introduce the term of two harmonious projections…
Positivity of block matrices of operators
Mohammad Sal Moslehian, Mohsen Kian, Qingxiang Xu
We review some of the significant generalizations and applications of the celebrated Douglas theorem on the equivalence of factorization, range inclusion, and majorization of opera…