Computes all eigenvalues and, optionally, eigenvectors of a real symmetric tridiagonal matrix. If eigenvectors are desired, an divide and conquer algorithm is used. Classes : D4a1 . Real symmetric matrix eigenvalue problems D4a5 . Tridiagonal matrix eigenvalue problems Type : Fortran subroutine in LAPACK package. Access : Public domain. Portable. Precision: Double. Usage : CALL DSTEVD (JOBZ, N, D, E, Z, LDZ, WORK, LWORK, IWORK, LIWORK, INFO) Details : Fullsource NeededBLAS Source Sites : (1) ITL (2) NETLIB
ITL: Unix Workstation Network, National Institute of Standards and Technology (NIST), Gaithersburg, MD. Available to NIST staff. Precision: Double. (Single: SSTEVD) Access available only to NIST staff on internal Unix systems. They may access this package provided the /itl tree is cross-mounted. Access : f77 -o myprog myprog.f -llapack -lblas NeededBLAS : Can be downloaded from netlib
NETLIB: Public access repository, The University of Tennessee at Knoxville and Bell Laboratories Precision: Double. (Single: SSTEVD) You may access components from NETLIB outside GAMS as follows. Source : See LAPACK Web Page Fullsource : See LAPACK Web Page
GAMS is a service of the Mathematical and Computational Sciences Division of the Information Technology Laboratory of the National Institute of Standards and Technology
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