home *** CD-ROM | disk | FTP | other *** search
-
-
-
- CCCCHHHHPPPPGGGGSSSSTTTT((((3333SSSS)))) CCCCHHHHPPPPGGGGSSSSTTTT((((3333SSSS))))
-
-
-
- NNNNAAAAMMMMEEEE
- CHPGST - reduce a complex Hermitian-definite generalized eigenproblem to
- standard form, using packed storage
-
- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- SUBROUTINE CHPGST( ITYPE, UPLO, N, AP, BP, INFO )
-
- CHARACTER UPLO
-
- INTEGER INFO, ITYPE, N
-
- COMPLEX AP( * ), BP( * )
-
- IIIIMMMMPPPPLLLLEEEEMMMMEEEENNNNTTTTAAAATTTTIIIIOOOONNNN
- These routines are part of the SCSL Scientific Library and can be loaded
- using either the -lscs or the -lscs_mp option. The -lscs_mp option
- directs the linker to use the multi-processor version of the library.
-
- When linking to SCSL with -lscs or -lscs_mp, the default integer size is
- 4 bytes (32 bits). Another version of SCSL is available in which integers
- are 8 bytes (64 bits). This version allows the user access to larger
- memory sizes and helps when porting legacy Cray codes. It can be loaded
- by using the -lscs_i8 option or the -lscs_i8_mp option. A program may use
- only one of the two versions; 4-byte integer and 8-byte integer library
- calls cannot be mixed.
-
- PPPPUUUURRRRPPPPOOOOSSSSEEEE
- CHPGST reduces a complex Hermitian-definite generalized eigenproblem to
- standard form, using packed storage. If ITYPE = 1, the problem is A*x =
- lambda*B*x,
- and A is overwritten by inv(U**H)*A*inv(U) or inv(L)*A*inv(L**H)
-
- If ITYPE = 2 or 3, the problem is A*B*x = lambda*x or
- B*A*x = lambda*x, and A is overwritten by U*A*U**H or L**H*A*L.
-
- B must have been previously factorized as U**H*U or L*L**H by CPPTRF.
-
-
- AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
- ITYPE (input) INTEGER
- = 1: compute inv(U**H)*A*inv(U) or inv(L)*A*inv(L**H);
- = 2 or 3: compute U*A*U**H or L**H*A*L.
-
- UPLO (input) CHARACTER
- = 'U': Upper triangle of A is stored and B is factored as
- U**H*U; = 'L': Lower triangle of A is stored and B is factored
- as L*L**H.
-
- N (input) INTEGER
- The order of the matrices A and B. N >= 0.
-
-
-
-
-
- PPPPaaaaggggeeee 1111
-
-
-
-
-
-
- CCCCHHHHPPPPGGGGSSSSTTTT((((3333SSSS)))) CCCCHHHHPPPPGGGGSSSSTTTT((((3333SSSS))))
-
-
-
- AP (input/output) COMPLEX array, dimension (N*(N+1)/2)
- On entry, the upper or lower triangle of the Hermitian matrix A,
- packed columnwise in a linear array. The j-th column of A is
- stored in the array AP as follows: if UPLO = 'U', AP(i + (j-
- 1)*j/2) = A(i,j) for 1<=i<=j; if UPLO = 'L', AP(i + (j-1)*(2n-
- j)/2) = A(i,j) for j<=i<=n.
-
- On exit, if INFO = 0, the transformed matrix, stored in the same
- format as A.
-
- BP (input) COMPLEX array, dimension (N*(N+1)/2)
- The triangular factor from the Cholesky factorization of B,
- stored in the same format as A, as returned by CPPTRF.
-
- INFO (output) INTEGER
- = 0: successful exit
- < 0: if INFO = -i, the i-th argument had an illegal value
-
- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- INTRO_LAPACK(3S), INTRO_SCSL(3S)
-
- This man page is available only online.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- PPPPaaaaggggeeee 2222
-
-
-
-