[PATCH 4 of 4] Have sparse LU return permutation matrices rather than sp

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[PATCH 4 of 4] Have sparse LU return permutation matrices rather than sp

From:	Jason Riedy
Subject:	[PATCH 4 of 4] Have sparse LU return permutation matrices rather than sparse matrices
Date:	Tue, 10 Mar 2009 22:14:26 -0400
User-agent:	Gnus/5.13 (Gnus v5.13) Emacs/23.0.91 (gnu/linux)

This could well impact user code.  It'd be interesting to see if there
is any actual fall-out...  Quite often, the permutation matrices are
applied to *dense* vectors.  Returning permutation matrices rather
than sparse matrices is a slight performance enhancement, but likely
lost in the noise.

0004-Have-sparse-LU-return-permutation-matrices-rather-th.patch
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[PATCH 0 of 4] Permutation matrices: One bugfix, one enhancement, sparse-perm ops, and a use in lu()., Jason Riedy, 2009/03/10
- [PATCH 1 of 4] Make the column permutation vector in sparse LU cols()-long, Jason Riedy, 2009/03/10
  - Re: [PATCH 1 of 4] Make the column permutation vector in sparse LU cols()-long, Jaroslav Hajek, 2009/03/11
- [PATCH 2 of 4] Add an override to Octave's find() for permutation matrices, Jason Riedy, 2009/03/10
  - Re: [PATCH 2 of 4] Add an override to Octave's find() for permutation matrices, Jaroslav Hajek, 2009/03/11
- [PATCH 3 of 4] Add perm * sparse, perm \ sparse, sparse * perm, and sparse / perm operations, Jason Riedy, 2009/03/10
- [PATCH 4 of 4] Have sparse LU return permutation matrices rather than sparse matrices, Jason Riedy <=
- [PATCH 0 of 4] Permutation matrices: One bugfix, one enhancement, sparse-perm ops, and a use in lu()., John W. Eaton, 2009/03/11
  - Re: [PATCH 0 of 4] Permutation matrices: One bugfix, one enhancement, sparse-perm ops, and a use in lu()., Jaroslav Hajek, 2009/03/11
- Re: [PATCH 0 of 4] Permutation matrices: One bugfix, one enhancement, sparse-perm ops, and a use in lu()., Jaroslav Hajek, 2009/03/11

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