Accession Number:

ADA455101

Title:

Deflated Krylov Subspace Methods for Nearly Singular Linear Systems

Descriptive Note:

Technical rept.

Corporate Author:

INTERGOVERNMENTAL OCEANOGRAPHIC COMMISSION PARIS (FRANCE)

Personal Author(s):

• Meza, Juan C.
• Symes, W. W.

Report Date:

1987-02-01

Pagination or Media Count:

20.0

Abstract:

This paper concerns the use of Krylov subspace methods for the solution of nearly singular nonsymmetric linear systems. We show that the Incomplete Orthogonalization Methods IOM in conjunction with certain deflation techniques of Stewart and Chan can be used to solve large non-symmetric linear systems which are nearly singular.

Descriptors:

• *LEAST SQUARES METHOD
• *VECTOR SPACES
• LINEAR SYSTEMS
• ASYMMETRY
• BOUNDARY VALUE PROBLEMS

Subject Categories:

• Theoretical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE