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- ZZZZGGGGEEEETTTTRRRRSSSS((((3333SSSS)))) ZZZZGGGGEEEETTTTRRRRSSSS((((3333SSSS))))
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- NNNNAAAAMMMMEEEE
- ZGETRS - solve a system of linear equations A * X = B, A**T * X = B, or
- A**H * X = B with a general N-by-N matrix A using the LU factorization
- computed by ZGETRF
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- SUBROUTINE ZGETRS( TRANS, N, NRHS, A, LDA, IPIV, B, LDB, INFO )
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- CHARACTER TRANS
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- INTEGER INFO, LDA, LDB, N, NRHS
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- INTEGER IPIV( * )
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- COMPLEX*16 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.
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- 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
- ZGETRS solves a system of linear equations A * X = B, A**T * X = B, or
- A**H * X = B with a general N-by-N matrix A using the LU factorization
- computed by ZGETRF.
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- AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
- TRANS (input) CHARACTER*1
- Specifies the form of the system of equations:
- = 'N': A * X = B (No transpose)
- = 'T': A**T * X = B (Transpose)
- = 'C': A**H * X = B (Conjugate transpose)
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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*16 array, dimension (LDA,N)
- The factors L and U from the factorization A = P*L*U as computed
- by ZGETRF.
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- PPPPaaaaggggeeee 1111
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- ZZZZGGGGEEEETTTTRRRRSSSS((((3333SSSS)))) ZZZZGGGGEEEETTTTRRRRSSSS((((3333SSSS))))
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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)
- The pivot indices from ZGETRF; for 1<=i<=N, row i of the matrix
- was interchanged with row IPIV(i).
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- B (input/output) COMPLEX*16 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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- PPPPaaaaggggeeee 2222
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