Computes all the eigenvalues and eigenvectors of a large sparse symmetric matrix outside a user defined excluded interval. Based on the block Lanczos algorithm with selective orthogonalization to compute Rayleigh-Ritz approximations to eigenpairs. Classes : D4a7 . Sparse matrix eigenvalue problems D4a1 . Real symmetric matrix eigenvalue problems Type : Fortran subroutine in LASO package. Access : Some uses prohibited. Portable. Precision: Single. Usage : CALL SILASO(OP, IOVECT, N, XL, XR, NFIG, NPERM, NMVAL, VAL, NMVEC, MAXVEC, VEC, NBLOCK, MAXOP, MAXJ, WORK, IND, IERR) Details : Documentation Example Fullsource Source Sites : (1) NETLIB
NETLIB: Public access repository, The University of Tennessee at Knoxville and Bell Laboratories Precision: Single. (Double: DILASO) You may access components from NETLIB outside GAMS as follows. Documentation: echo 'send doc from laso' | mail netlib@ornl.gov Example : echo 'send lanczos3 from laso' | mail netlib@ornl.gov Source : echo "send only silaso from laso" | mail netlib@ornl.gov Fullsource : echo "send silaso from laso" | mail netlib@ornl.gov
GAMS is a service of the Mathematical and Computational Sciences Division of the Information Technology Laboratory of the National Institute of Standards and Technology
This page was generated on Wed Sep 17, 2008 at 14:02:08 UTC