Comment #4 on issue 1421 by Vinzent.Steinberg: QRdecomposition fails for some matrices http://code.google.com/p/sympy/issues/detail?id=1421
Yep, probably you are right. Currently sympy does exact linear algebra (if you use Rational()), so QRsolve is mainly of educational interest. :) If I recall it correctly, LUsolve does not use full pivoting, so it's also numerically unstable if used in conjunction with Real(). -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to sympy-issues@googlegroups.com To unsubscribe from this group, send email to sympy-issues+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en -~----------~----~----~----~------~----~------~--~---
