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Vector-valued pseudo almost periodic functions

Chuan Yi Zhang — 1997

Czechoslovak Mathematical Journal

Vector-valued pseudo almost periodic functions are defined and their properties are investigated. The vector-valued functions contain many known functions as special cases. A unique decomposition theorem is given to show that a vector-valued pseudo almost periodic function is a sum of an almost periodic function and an ergodic perturbation.

A convergence analysis of SOR iterative methods for linear systems with weakH-matrices

Cheng-yi ZhangZichen XueShuanghua Luo — 2016

Open Mathematics

It is well known that SOR iterative methods are convergent for linear systems, whose coefficient matrices are strictly or irreducibly diagonally dominant matrices and strong H-matrices (whose comparison matrices are nonsingular M-matrices). However, the same can not be true in case of those iterative methods for linear systems with weak H-matrices (whose comparison matrices are singular M-matrices). This paper proposes some necessary and sufficient conditions such that SOR iterative methods are...

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