Multiprocessor sparse SVD algorithms and applications:

Abstract: "In this thesis, we develop four numerical methods for computing the singular value decomposition (SVD) of large sparse matrices on a multiprocessor architecture. We particularly consider the SVD of unstructured sparse matrices in which the number of rows may be substantially larger o...

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Bibliographische Detailangaben
1. Verfasser: Berry, Michael W. (VerfasserIn)
Format: Buch
Sprache:English
Veröffentlicht: Urbana, Ill. 1990
Schriftenreihe:Center for Supercomputing Research and Development <Urbana, Ill.>: CSRD report 1049
Schlagworte:
Zusammenfassung:Abstract: "In this thesis, we develop four numerical methods for computing the singular value decomposition (SVD) of large sparse matrices on a multiprocessor architecture. We particularly consider the SVD of unstructured sparse matrices in which the number of rows may be substantially larger or smaller than the number of columns. On vector machines, considerable progress has been made over past 10 years in developing robust algorithms for the solution of the sparse symmetric eigenvalue problem using subspace iteration and the Lanczos scheme, with or without a re-orthogonalization strategy
Our intent is to extend and refine this knowledge for computing the sparse singular value decomposition on shared memory parallel computers. We emphasize Lanczos, block-Lanczos, subspace iteration, and the trace minimization methods for determining several of the largest (or smallest) singular triplets (singular values and corresponding left-and- right-singular vectors) for sparse matrices. The target architectures for implementations of such methods include the Alliant FX/80 and the Cray- 2S/4128
This algorithmic research is particularly motivated by recent information-retrieval techniques in which high-rank approximations to large sparse term-document matrices are needed, and by nonlinear inverse problems arising from seismic reflection tomography applications.
Beschreibung:Zugl.: Urbana, Ill., Univ., Diss., 1991
Beschreibung:173 S.

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