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Unexpected result calculating the determinant of a singular matrix (42S)
10-21-2019, 01:49 PM
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RE: Unexpected result calculating the determinant of a singular matrix (42S)
(10-21-2019 11:58 AM)John Keith Wrote:  The HP 50 in approximate mode and with flag -54 (the "cheat" flag) set*, returns 0 for both Dave's and Thomas's matrices. I'm surprised that the 42s gives an inexact result, I assumed the internal code for matrix math was essentially the same as the 48/49 series.

It looks like the "cheat" was added with the 48G. I just tried calculating the determinant with my 48SX, and I get the same 3.30000000001E-12 as the 42S. I don't have a 28S/C handy, but I would expect they do the same as the 42S and 48SX.
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RE: Unexpected result calculating the determinant of a singular matrix (42S) - Dave Britten - 10-21-2019 01:49 PM



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