Question: Explain why, if P A LU is a PLU factorization, detpAq p 1 qsu 1 1 u 2 2 unn p 1 qs n i

Explain why, if P A LU is a PLU factorization,
detpAq p 1qsu11u22 unn p 1qs
n
i1
uii

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