"A matrix with zeros on the diagonal and positive numbers elsewhere is called a zero-diagonal matrix. Zero-diagonal matrices are not invertible. This means that there is no matrix that can be multiplied by the zero-diagonal matrix to produce the identity matrix." -- Google's AI
@ProfKinyon Good grief, how does it churn out this nonsense? I really doubt there was anything quite so horribly wrong in its training data, but I guess it must be taking a correct discussion of the non-invertibility of diagonalised matrices with at least one zero on the diagonal and garbling it, while blending the result into something smoothly grammatical, utterly confident, and totally wrong.
@gregeganSF
Weapons of Mass Misinformation
@ProfKinyon