image and matrix editor

[Arno K]

Hi Salvo, hi Han,
when I today came across the task to solve a system of differential-equations, i.e. y'=A*y with some matrix A, which the prime happily solves with A stored in M1, one of the built-in matrices, I stumbled upon your program and clearly QPI by Han. The main reason for my search was that jordan(M1) delivered some weird looking results although I had only entered integers: M1 was
[[-3,0,1],[-2,-2,2],[-1,0,-1]]. jordan(matrix direct) worked fine. As said above I looked for a solution of my problem, found your qpimat and the needed QPI but jordan(qpimat(M1)) still produced the same weird decimal result. So either your or Han's program seem to have to be partly rewritten to produce integers for inputs in integers.
Arno