Factorization

The single precision LAPACK factorization function is sgetrf (single precision, general matrix, triangular factorization).

It is called by

The arguments are

m

(input) Number of rows of A;

n

(input) Number of columns of A;

A

(input) The matrix A; and (output) the L and U factors;

lda

(input) leading dimension of matrix A.

Ipiv

(output) n-dimensional integer vector of permutations;

Info

(output) the status of factorization. 0=success, means singularity - , means incorrect -th argument.