Unexpected result calculating the determinant of a singular matrix (42S)

10212019, 04:46 PM
(This post was last modified: 10212019 04:48 PM by Claudio L..)
Post: #14




RE: Unexpected result calculating the determinant of a singular matrix (42S)
(10212019 03:06 PM)Thomas Okken Wrote: But the 48G returns exactly zero regardless of whether flag 54 is set or clear... May or may not be a coincidence. There are divisionfree decomposition algorithms that preserve integers, so if an integer matrix is given, all operations remain integer up until the end. I don't know if this is the case for Free42 or the 48g, I know it is the case with newRPL. My point is, you don't necessarily need a cheat to get a good result with integer matrices. Here's one algorithm, for example (not the one I used, but same idea). I think this one is the one used by newRPL. 

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