ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Tue, 06 Aug 2019 07:33:47 +0200Optimal method to invert symbolic matrixhttps://ask.sagemath.org/question/47401/optimal-method-to-invert-symbolic-matrix/ If I read the source code correctly, a matrix defined over SR is inverted by the Moore-Penrose pseudo-inversion. For a real, symmetric, symbolic, full-rank matrix, is this algorithm optimal? Or is there another algorithm that would be a) less memory intensive, and/or b) less time-consuming. [In my particular case, the attempted inversion of a 4x4 matrix runs out of memory (8 GB) after approximately 15 hours.]Tue, 06 Aug 2019 01:04:16 +0200https://ask.sagemath.org/question/47401/optimal-method-to-invert-symbolic-matrix/Comment by tmonteil for <p>If I read the source code correctly, a matrix defined over SR is inverted by the Moore-Penrose pseudo-inversion. For a real, symmetric, symbolic, full-rank matrix, is this algorithm optimal? Or is there another algorithm that would be a) less memory intensive, and/or b) less time-consuming. [In my particular case, the attempted inversion of a 4x4 matrix runs out of memory (8 GB) after approximately 15 hours.]</p>
https://ask.sagemath.org/question/47401/optimal-method-to-invert-symbolic-matrix/?comment=47406#post-id-47406Could you please provide your 4x4 matrix ?Tue, 06 Aug 2019 07:33:47 +0200https://ask.sagemath.org/question/47401/optimal-method-to-invert-symbolic-matrix/?comment=47406#post-id-47406