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- CCCCPPPPPPPPTTTTRRRRSSSS((((3333FFFF)))) CCCCPPPPPPPPTTTTRRRRSSSS((((3333FFFF))))
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- NNNNAAAAMMMMEEEE
- CPPTRS - solve a system of linear equations A*X = B with a Hermitian
- positive definite matrix A in packed storage using the Cholesky
- factorization A = U**H*U or A = L*L**H computed by CPPTRF
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- SUBROUTINE CPPTRS( UPLO, N, NRHS, AP, B, LDB, INFO )
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- CHARACTER UPLO
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- INTEGER INFO, LDB, N, NRHS
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- COMPLEX AP( * ), B( LDB, * )
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- PPPPUUUURRRRPPPPOOOOSSSSEEEE
- CPPTRS solves a system of linear equations A*X = B with a Hermitian
- positive definite matrix A in packed storage using the Cholesky
- factorization A = U**H*U or A = L*L**H computed by CPPTRF.
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- AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
- UPLO (input) CHARACTER*1
- = 'U': Upper triangle of A is stored;
- = 'L': Lower triangle of A is stored.
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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 triangular factor U or L from the Cholesky factorization A =
- U**H*U or A = L*L**H, packed columnwise in a linear array. The
- j-th column of U or L is stored in the array AP as follows: if
- UPLO = 'U', AP(i + (j-1)*j/2) = U(i,j) for 1<=i<=j; if UPLO =
- 'L', AP(i + (j-1)*(2n-j)/2) = L(i,j) for j<=i<=n.
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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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- PPPPaaaaggggeeee 1111
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