Do you know a nice proof of this that doesn't involve cofactors and induction?
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Replying to @MathewPCalkins
i think Cayley-Hamilton might be a clever way to do it
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Replying to @InertialObservr @MathewPCalkins
the coefficient on the unit matrix is always +- det(A) .. so "factor" out A and take the derivative with respect to det(A)
12:17 PM - 31 Oct 2019
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