te a different performance.
        = 4 : Compute a row permutation of the matrix so that the sum
              of the diagonal entries of the permuted matrix is maximized.
        = 5 : Compute a row permutation of the matrix so that the product
              of the diagonal entries of the permuted matrix is maximized
              and vectors to scale the matrix so that the nonzero diagonal 
              entries of the permuted matrix are one in absolute value and 
              all the off-diagonal entr