Computes a QR factorization of a general rectangular matrix (unblocked algorithm).
Returns the value of the 1-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element, of a triangular matrix.
Forms the triangular vector
T of a block reflector
Forms the Wilkinson transform.
Reorders the Schur factorization of a general matrix.
Computes selected eigenvalues and initial representations needed for eigenvector computations.
Copies a submatrix from one trapezoidal matrix to another.
Passes character strings from Fortran routines to C routines.
Retrieves the number of the current iteration and updates the solution.