4 ms·
Two ways to compute the determinant: 1) product of eigenvalues 2) cofactor expansion (e.g., https://textbooks.math.gatech.edu/ila/determinants-cofactors.html
by mturmon 2y ago
Two ways to compute the determinant:
1) product of eigenvalues
2) cofactor expansion (e.g., https://textbooks.math.gatech.edu/ila/determinants-cofactors.html https://textbooks.math.gatech.edu/ila/determinants-cofactors...)
The second is the one I was taught first, in the context of linear system solution, but it does not seem obvious that it would be related to the product of eigenvalues. It’s kind of a weird pile of arithmetic manipulations.