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

[Gene]

(05-18-2018 10:58 PM)Valentin Albillo Wrote:  

(05-18-2018 09:39 PM)Gene Wrote:  A test of accuracy could be to see for machines that can do this calculation...

What size matrix is the level at which the answer is a non-integer for the first time. Then ... what caused it to be a non-integer?

It's not only a function of matrix size but also of its elements, you can get a non-integer determinant even for some 2x2 specific matrix. And I already said in the previous post what causes it: division by some pivot(s) which result in non-exact quotients.

Regards and have a nice weekend.
V.
.

Thanks Valentin.

I should have said for these matrices as specified here. Some with only the 0 and 1 elements which **ought** to be an integer answer are getting round off with 0 and 1's. Can we really have a pivot that isn't a 0 or 1 in this case?

Apparently! :-)