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

10212019, 06:00 PM
Post: #16




RE: Unexpected result calculating the determinant of a singular matrix (42S)
(10212019 01:54 AM)Dave Britten Wrote: When calculating the determinant of the matrix [[2,1,3][1,2,1][3,1,2]] on my 42S, I would expect to get 0 as it is a singular matrix. But the 42S says it's 3.30000000001E12. How does the 42S calculate determinants that would lead to that result? And how do I identify when it's giving me a suspicious result? I've done very little linear algebra, so there might be something simple and obvious going on here. Prime gets 0 in Home screen Tom L Cui bono? 

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