3 papers
math.NA2021
Convergence analysis of two-level methods with general coarse solvers
Xuefeng Xu
Multilevel methods are among the most efficient numerical methods for solving large-scale linear systems that arise from discretized partial differential equations. The fundamental…
math.NA2018
On the perturbation of the Moore-Penrose inverse of a matrix
Xuefeng Xu
The Moore-Penrose inverse of a matrix has been extensively investigated and widely applied in many fields over the past decades. One reason for the interest is that the Moore-Penro…
math.NA2018
On the perturbation of an -orthogonal projection
Xuefeng Xu
The -orthogonal projection onto a subspace is an important mathematical tool, which has been widely applied in many fields such as linear least squares problems, eigenvalue pr…