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- CSPTRS - solve a system of linear equations A*X = B with a complex
- symmetric matrix A stored in packed format using the factorization A =
- U*D*U**T or A = L*D*L**T computed by CSPTRF
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- SUBROUTINE CSPTRS( UPLO, N, NRHS, AP, IPIV, B, LDB, INFO )
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- CHARACTER UPLO
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- INTEGER INFO, LDB, N, NRHS
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- INTEGER IPIV( * )
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- COMPLEX AP( * ), B( LDB, * )
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- PPPPUUUURRRRPPPPOOOOSSSSEEEE
- CSPTRS solves a system of linear equations A*X = B with a complex
- symmetric matrix A stored in packed format using the factorization A =
- U*D*U**T or A = L*D*L**T computed by CSPTRF.
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- 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**T;
- = 'L': Lower triangular, form is A = L*D*L**T.
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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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- AP (input) COMPLEX array, dimension (N*(N+1)/2)
- The block diagonal matrix D and the multipliers used to obtain
- the factor U or L as computed by CSPTRF, stored as a packed
- triangular matrix.
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- IPIV (input) INTEGER array, dimension (N)
- Details of the interchanges and the block structure of D as
- determined by CSPTRF.
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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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