Higher triangular should be interpreted as getting only zero entries underneath the main diagonal, which starts with the upper still left corner. Illustration[edit] If a square, invertible matrix has an LDU (factorization with all diagonal entries of L and U equivalent to 1), then the factorization is exclusive.[5] In http://accessories76.bluxeblog.com/24266768/facts-about-how-t-u-an-l-b-d-revealed