41CL Quiz: Determinant of 30x30 anti-Identity matrix

[Valentin Albillo]

(05-18-2018 06:48 PM)hibiki Wrote:  Iut my curiosity is why a simple sum or subtraction of a string of 1's (integers) multiplied 29 times and accumulated 29 times resulted in a non integer number in some responses.

The exact determinant of an all-integer matrix is always an integer, mathematically, but the algorithms used by many non-CAS models involve divisions by pivot elements and this may introduce non-exactness in the final result.

V.
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