QL

f08jec   All eigenvalues and eigenvectors of real symmetric tridiagonal matrix, reduced from real symmetric matrix using implicit QL or QR
f08jfc   All eigenvalues of real symmetric tridiagonal matrix, root-free variant of QL or QR
f08jsc   All eigenvalues and eigenvectors of real symmetric tridiagonal matrix, reduced from complex Hermitian matrix, using implicit QL or QR

NAG C Library
Keywords in Context Index
© The Numerical Algorithms Group Ltd, Oxford UK. 2002