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LU-factorization with pivoting. Outputs (L U P) where

L is low diagonal with unity at diagnoals, U is upper diagnoal and

P is an permutation matrix, so that A = P L U.

L is low diagonal with unity at diagnoals, U is upper diagnoal and

P is an permutation matrix, so that A = P L U.

lu-factor < matrix-base > |