ASKSAGE: Sage Q&A Forum - Latest question feedhttp://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Mon, 05 Aug 2019 18:04:16 -0500Optimal method to invert symbolic matrixhttp://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.]Richard_LMon, 05 Aug 2019 18:04:16 -0500http://ask.sagemath.org/question/47401/pseudo-inverse of a Zmod(2) matrixhttp://ask.sagemath.org/question/32675/pseudo-inverse-of-a-zmod2-matrix/ I have a 25 x 25 Zmod(2) matrix that is singular, and I would like to find the pseudo-inverse. I haven't found anything yet that will work. Suggestions?doug719Fri, 26 Feb 2016 17:05:36 -0600http://ask.sagemath.org/question/32675/