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- CHETRS - solve a system of linear equations A*X = B with a complex
- Hermitian matrix A using the factorization A = U*D*U**H or A = L*D*L**H
- computed by CHETRF
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- SUBROUTINE CHETRS( UPLO, N, NRHS, A, LDA, IPIV, B, LDB, INFO )
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- CHARACTER UPLO
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- INTEGER INFO, LDA, LDB, N, NRHS
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- INTEGER IPIV( * )
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- COMPLEX A( LDA, * ), B( LDB, * )
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- 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.
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- PPPPUUUURRRRPPPPOOOOSSSSEEEE
- CHETRS solves a system of linear equations A*X = B with a complex
- Hermitian matrix A using the factorization A = U*D*U**H or A = L*D*L**H
- computed by CHETRF.
-
- AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
- UPLO (input) CHARACTER*1
- Specifies whether the details of the factorization are stored as
- an upper or lower triangular matrix. = 'U': Upper triangular,
- form is A = U*D*U**H;
- = 'L': Lower triangular, form is A = L*D*L**H.
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- N (input) INTEGER
- The order of the matrix A. N >= 0.
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- NRHS (input) INTEGER
- The number of right hand sides, i.e., the number of columns of
- the matrix B. NRHS >= 0.
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- A (input) COMPLEX array, dimension (LDA,N)
- The block diagonal matrix D and the multipliers used to obtain
- the factor U or L as computed by CHETRF.
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- LDA (input) INTEGER
- The leading dimension of the array A. LDA >= max(1,N).
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- IPIV (input) INTEGER array, dimension (N)
- Details of the interchanges and the block structure of D as
- determined by CHETRF.
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- B (input/output) COMPLEX array, dimension (LDB,NRHS)
- On entry, the right hand side matrix B. On exit, the solution
- matrix X.
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- LDB (input) INTEGER
- The leading dimension of the array B. LDB >= max(1,N).
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- INFO (output) INTEGER
- = 0: successful exit
- < 0: if INFO = -i, the i-th argument had an illegal value
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- INTRO_LAPACK(3S), INTRO_SCSL(3S)
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- This man page is available only online.
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