SUBSPACE SEARCH METHOD FOR A CLASS OF LEAST SQUARES PROBLEM

• 来源期刊: 计算数学（英文版）
• 关键词: Subspace search method A class of least squqres problem Convergence
• 年，卷（期）: 2000,（2）
• 页码范围: 133-140
• 页数: 8页
• 语种: 英文

摘要

A subspace search method for solving a class of least squares problem is pre sented in the paper. The original problem is divided into many independent sub problems, and a search direction is obtained by solving each of the subproblems, as well as a new iterative point is determined by choosing a suitable steplength such that the value of residual norm is decreasing. The convergence result is also given. The numerical test is also shown for a special problem,