GROUPS OF BANDED MATRICES WITH BANDED INVERSES
In: Proceedings of the American Mathematical Society, Jg. 139 (2011), Heft 12, S. 4255-4264
Online
academicJournal
- print, 13 ref
Zugriff:
A product A = F1 ... FN of invertible block-diagonal matrices will be banded with a banded inverse: Aij = 0 and also (A-1)ij = 0 for |i-j| > w. We establish this factorization with the number N controlled by the bandwidths w and not by the matrix size n. When A is an orthogonal matrix, or a permutation, or banded plus finite rank, the factors Fi have w = 1 and we find generators of that corresponding group. In the case of infinite matrices, the A = LPU factorization is now established but conjectures remain open.
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GROUPS OF BANDED MATRICES WITH BANDED INVERSES
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Autor/in / Beteiligte Person: | STRANG, Gilbert |
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Zeitschrift: | Proceedings of the American Mathematical Society, Jg. 139 (2011), Heft 12, S. 4255-4264 |
Veröffentlichung: | Providence, RI: American Mathematical Society, 2011 |
Medientyp: | academicJournal |
Umfang: | print, 13 ref |
ISSN: | 0002-9939 (print) |
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