STRUCTURED BACKWARD ERRORS FOR STRUCTURED KKT SYSTEMS

• 来源期刊: 计算数学(英文版)
• 关键词: Structured - KKT system Structured backward error Normwise backward error.
• 年，卷（期）: 2004,（4）
• 页码范围: 605-610
• 页数: 6页
• 语种: 英文

摘要

In this paper we study structured backward errors for some structured KKT systems.Normwise structured backward errors for structured KKT systems are defined, and computable formulae of the structured backward errors are obtained. Simple numerical examples show that the structured backward errors may be much larger than the unstructured ones in some cases.