Fortran Subroutines

Some articles on fortran, subroutines:

List Of Numerical Libraries - Fortran
... CERNLIB is a collection of FORTRAN 77 libraries and modules ... computation of eigenvalues and eigenvectors of matrices, written in FORTRAN ... It contains subroutines for calculating the eigenvalues of nine classes of matrices complex general, complex Hermitian, real general, real symmetric, real symmetric banded, real ...