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

10212019, 01:54 AM
Post: #1




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


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