Computes a split Cholesky factorization of a real symmetric positive definite band matrix. Designed to be used in conjunction with SSBGST. The factorization has the form A = S'S, where S is a band matrix of the same bandwidth as A, with block rows ( U 0 ) and ( M L ), where U is upper triangular of order m = (n+b)/2, L is lower triangular of order n-m, and b is the bandwidth of A. Classes : D4c1c . Standardize matrix eigenvalue problem D3b2 . Determinants of real symmetric positive definite banded matrices Type : Fortran subroutine in LAPACK package. Access : Public domain. Portable. Precision: Single. Usage : CALL SPBSTF (UPLO, N, KD, AB, LDAB, INFO) See also : SSBGST 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: Single. (Double: DPBSTF) 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: Single. (Double: DPBSTF) 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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