Qingxiang Xu

Seminorm and numerical radius inequalities of operators in semi-Hilbertian spaces

Mohammad Sal Moslehian, Qingxiang Xu, Ali Zamani · Linear Algebra and its Applications · 2020 · 74 citations · Full text

Spectral Theory, Topological Semigroups, Linear Operator +5

The Stable Perturbation of the Drazin Inverse of the Square Matrices

Qingxiang Xu, Chuanning Song, Yimin Wei · SIAM Journal on Matrix Analysis and Applications · 2010 · 48 citations

Spectral Theory, Complex Matrix A, Engineering +11

Sharp Norm-Estimations for Moore–Penrose Inverses of Stable Perturbations of Hilbert $C^*$-Module Operators

Qingxiang Xu, Yimin Wei, Yangyang Gu · SIAM Journal on Numerical Analysis · 2010 · 39 citations

Spectral Theory, Linear Operator, Engineering +13

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

Qingxiang Xu, Zhongming Ye, Ali Zamani · Advances in Operator Theory · 2020 · 31 citations

Block Matrices, Matrix Method, Matrix Theory +3

The polar decomposition for adjointable operators on Hilbert $C^*$-modules and centered operators

Na Liu‎, Wei Luo, Qingxiang Xu · Advances in Operator Theory · 2018 · 27 citations

Spectral Theory, Linear Operator, Engineering +3