computes a permutation vector P such that the LU factorization of A
(:,P) tends to be sparser than that of A. The Cholesky factorization
of (A (:,P))'*(A (:,P)) will also tend to be sparser than that of
computes a permutation vector P such that the LU factorization of A
(:,P) tends to be sparser than that of A. The Cholesky factorization
of (A (:,P))'*(A (:,P)) will also tend to be sparser than that of