PROPERTIES AND ALGORITHM ON PRECONDITIONED CONJUGATE GRADIENT METHOD

被引：0

作者：

田伶改

机构：

来源：

NumericalMathematicsAJournalofChineseUniversities(EnglishSeries) | 2004年 / 01期

关键词：

symmetric positive definite system of linear algebraic equations; preconditioned gradient coujugate method; significant digits;

D O I：

暂无

中图分类号：

O241 [数值分析];

学科分类号：

070102 ;

摘要：

<正> Some properties of the preconditioned gradient conjugate method are given.It may happen that loss of significant digits, when the norm of residual is very small. Toavoid this, a variant algorithm which does not use the residual is put forward.

引用

页码：24 / 30

页数：7