Computes the factorization of a real symmetric matrix A using the
Bunch-Kaufman diagonal pivoting method.
The for of the factorization is:
\A = L*D*L**T
Where L is product if permutation and unit lower triangular matrices,
and D is symmetric and block diagonal with '1 x 1' and '2 x 2'
diagonal blocks.
Computes the factorization of a real symmetric matrix A using the Bunch-Kaufman diagonal pivoting method. The for of the factorization is: \A = L*D*L**T Where L is product if permutation and unit lower triangular matrices, and D is symmetric and block diagonal with '1 x 1' and '2 x 2' diagonal blocks.