version 1.3, 2018/05/29 06:55:25
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version 1.6, 2023/08/07 08:39:38
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*> matrices. |
*> matrices. |
*> |
*> |
*> Aasen's algorithm is used to factor A as |
*> Aasen's algorithm is used to factor A as |
*> A = U * T * U**T, if UPLO = 'U', or |
*> A = U**T * T * U, if UPLO = 'U', or |
*> A = L * T * L**T, if UPLO = 'L', |
*> A = L * T * L**T, if UPLO = 'L', |
*> where U (or L) is a product of permutation and unit upper (lower) |
*> where U (or L) is a product of permutation and unit upper (lower) |
*> triangular matrices, and T is symmetric tridiagonal. The factored |
*> triangular matrices, and T is symmetric tridiagonal. The factored |
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*> |
*> |
*> On exit, if INFO = 0, the tridiagonal matrix T and the |
*> On exit, if INFO = 0, the tridiagonal matrix T and the |
*> multipliers used to obtain the factor U or L from the |
*> multipliers used to obtain the factor U or L from the |
*> factorization A = U*T*U**T or A = L*T*L**T as computed by |
*> factorization A = U**T*T*U or A = L*T*L**T as computed by |
*> ZSYTRF. |
*> ZSYTRF. |
*> \endverbatim |
*> \endverbatim |
*> |
*> |
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*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2017 |
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* |
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*> \ingroup complex16SYsolve |
*> \ingroup complex16SYsolve |
* |
* |
* ===================================================================== |
* ===================================================================== |
SUBROUTINE ZSYSV_AA( UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, |
SUBROUTINE ZSYSV_AA( UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, |
$ LWORK, INFO ) |
$ LWORK, INFO ) |
* |
* |
* -- LAPACK driver routine (version 3.8.0) -- |
* -- LAPACK driver routine -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* November 2017 |
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* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER UPLO |
CHARACTER UPLO |
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LWKOPT_SYTRS = INT( WORK(1) ) |
LWKOPT_SYTRS = INT( WORK(1) ) |
LWKOPT = MAX( LWKOPT_SYTRF, LWKOPT_SYTRS ) |
LWKOPT = MAX( LWKOPT_SYTRF, LWKOPT_SYTRS ) |
WORK( 1 ) = LWKOPT |
WORK( 1 ) = LWKOPT |
IF( LWORK.LT.LWKOPT .AND. .NOT.LQUERY ) THEN |
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INFO = -10 |
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END IF |
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END IF |
END IF |
* |
* |
IF( INFO.NE.0 ) THEN |
IF( INFO.NE.0 ) THEN |
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RETURN |
RETURN |
END IF |
END IF |
* |
* |
* Compute the factorization A = U*T*U**T or A = L*T*L**T. |
* Compute the factorization A = U**T*T*U or A = L*T*L**T. |
* |
* |
CALL ZSYTRF_AA( UPLO, N, A, LDA, IPIV, WORK, LWORK, INFO ) |
CALL ZSYTRF_AA( UPLO, N, A, LDA, IPIV, WORK, LWORK, INFO ) |
IF( INFO.EQ.0 ) THEN |
IF( INFO.EQ.0 ) THEN |