Problem 45221. cofactor matrix

Created by Asif Newaz

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given a matrix, find its cofactor matrix https://en.wikipedia.org/wiki/Minor_(linear_algebra)#Inverse_of_a_matrix

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Last Solution submitted on Oct 16, 2025

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William on 5 Dec 2019

Why is there a value 4.000000000000001 in the cofactor matrix of problem 4? The matrix is composed entirely of integers, so the cofactors should all be integers as well.

Asif Newaz on 11 Dec 2019

@william .. sorry man-- i overlooked .. i've corrected it now.
sth related to the determinant function- matlab provided that answer. i didn't see that

Dyuman Joshi on 5 Dec 2020

Why is det(x)*inv(x) not working?

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Problem 45221. cofactor matrix

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Problem 45221. cofactor matrix

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