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version 1.16, 2020/05/21 21:46:07
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*> \brief \b ZLA_SYRPVGRW |
*> \brief \b ZLA_SYRPVGRW computes the reciprocal pivot growth factor norm(A)/norm(U) for a symmetric indefinite matrix. |
* |
* |
* =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
* |
* |
* Online html documentation available at |
* Online html documentation available at |
* http://www.netlib.org/lapack/explore-html/ |
* http://www.netlib.org/lapack/explore-html/ |
* |
* |
*> \htmlonly |
*> \htmlonly |
*> Download ZLA_SYRPVGRW + dependencies |
*> Download ZLA_SYRPVGRW + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zla_syrpvgrw.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zla_syrpvgrw.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zla_syrpvgrw.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zla_syrpvgrw.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zla_syrpvgrw.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zla_syrpvgrw.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
* |
* |
* DOUBLE PRECISION FUNCTION ZLA_SYRPVGRW( UPLO, N, INFO, A, LDA, AF, |
* DOUBLE PRECISION FUNCTION ZLA_SYRPVGRW( UPLO, N, INFO, A, LDA, AF, |
* LDAF, IPIV, WORK ) |
* LDAF, IPIV, WORK ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* CHARACTER*1 UPLO |
* CHARACTER*1 UPLO |
* INTEGER N, INFO, LDA, LDAF |
* INTEGER N, INFO, LDA, LDAF |
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* DOUBLE PRECISION WORK( * ) |
* DOUBLE PRECISION WORK( * ) |
* INTEGER IPIV( * ) |
* INTEGER IPIV( * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
*> |
*> |
*> \verbatim |
*> \verbatim |
*> |
*> |
*> |
*> |
*> ZLA_SYRPVGRW computes the reciprocal pivot growth factor |
*> ZLA_SYRPVGRW computes the reciprocal pivot growth factor |
*> norm(A)/norm(U). The "max absolute element" norm is used. If this is |
*> norm(A)/norm(U). The "max absolute element" norm is used. If this is |
*> much less than 1, the stability of the LU factorization of the |
*> much less than 1, the stability of the LU factorization of the |
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*> as determined by ZSYTRF. |
*> as determined by ZSYTRF. |
*> \endverbatim |
*> \endverbatim |
*> |
*> |
*> \param[in] WORK |
*> \param[out] WORK |
*> \verbatim |
*> \verbatim |
*> WORK is COMPLEX*16 array, dimension (2*N) |
*> WORK is DOUBLE PRECISION array, dimension (2*N) |
*> \endverbatim |
*> \endverbatim |
* |
* |
* Authors: |
* Authors: |
* ======== |
* ======== |
* |
* |
*> \author Univ. of Tennessee |
*> \author Univ. of Tennessee |
*> \author Univ. of California Berkeley |
*> \author Univ. of California Berkeley |
*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2011 |
*> \date December 2016 |
* |
* |
*> \ingroup complex16SYcomputational |
*> \ingroup complex16SYcomputational |
* |
* |
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DOUBLE PRECISION FUNCTION ZLA_SYRPVGRW( UPLO, N, INFO, A, LDA, AF, |
DOUBLE PRECISION FUNCTION ZLA_SYRPVGRW( UPLO, N, INFO, A, LDA, AF, |
$ LDAF, IPIV, WORK ) |
$ LDAF, IPIV, WORK ) |
* |
* |
* -- LAPACK computational routine (version 3.4.0) -- |
* -- LAPACK computational routine (version 3.7.0) -- |
* -- 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 2011 |
* December 2016 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER*1 UPLO |
CHARACTER*1 UPLO |
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INTRINSIC ABS, REAL, DIMAG, MAX, MIN |
INTRINSIC ABS, REAL, DIMAG, MAX, MIN |
* .. |
* .. |
* .. External Subroutines .. |
* .. External Subroutines .. |
EXTERNAL LSAME, ZLASET |
EXTERNAL LSAME |
LOGICAL LSAME |
LOGICAL LSAME |
* .. |
* .. |
* .. Statement Functions .. |
* .. Statement Functions .. |