I have tracked down an error in one of my SAGE scripts down to following behavior of SAGE:
The following code does what you'd expect: M= Matrix([[1,0,0],[0,1,0],[0,0,1]]); M=M*91/100; #the line we modify later print M; N= M.inverse(); #or: N= M^(-1) print N; print N*M #result, should be neutral element If you replace the line with the command M=M*91/100; by: M=M*0.91; then following error message shows up: ZeroDivisionError: self is not invertible (I find it very interesting that the command: M=M*0.9; does not produce this error) Also interesting is that i can supress the error by inserting: M= M*0.91; M= M.n(20); into the line. Unfortunately this does not work in my original programm. How can I invert a matrix with such elements? --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
