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version 1.2, 2016/08/27 15:35:04
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version 1.3, 2017/06/17 10:54:25
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| * |
* |
| * =========== 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/ |
| * |
* |
| * Definition: |
* Definition: |
| * =========== |
* =========== |
| * |
* |
| * RECURSIVE SUBROUTINE ZPOTRF2( UPLO, N, A, LDA, INFO ) |
* RECURSIVE SUBROUTINE ZPOTRF2( UPLO, N, A, LDA, INFO ) |
| * |
* |
| * .. Scalar Arguments .. |
* .. Scalar Arguments .. |
| * CHARACTER UPLO |
* CHARACTER UPLO |
| * INTEGER INFO, LDA, N |
* INTEGER INFO, LDA, N |
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| * .. Array Arguments .. |
* .. Array Arguments .. |
| * COMPLEX*16 A( LDA, * ) |
* COMPLEX*16 A( LDA, * ) |
| * .. |
* .. |
| * |
* |
| * |
* |
| *> \par Purpose: |
*> \par Purpose: |
| * ============= |
* ============= |
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| *> |
*> |
| *> The subroutine calls itself to factor A11. Update and scale A21 |
*> The subroutine calls itself to factor A11. Update and scale A21 |
| *> or A12, update A22 then call itself to factor A22. |
*> or A12, update A22 then call itself to factor A22. |
| *> |
*> |
| *> \endverbatim |
*> \endverbatim |
| * |
* |
| * Arguments: |
* Arguments: |
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| * 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 2015 |
*> \date December 2016 |
| * |
* |
| *> \ingroup complex16POcomputational |
*> \ingroup complex16POcomputational |
| * |
* |
| * ===================================================================== |
* ===================================================================== |
| RECURSIVE SUBROUTINE ZPOTRF2( UPLO, N, A, LDA, INFO ) |
RECURSIVE SUBROUTINE ZPOTRF2( UPLO, N, A, LDA, INFO ) |
| * |
* |
| * -- LAPACK computational routine (version 3.6.0) -- |
* -- 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 2015 |
* December 2016 |
| * |
* |
| * .. Scalar Arguments .. |
* .. Scalar Arguments .. |
| CHARACTER UPLO |
CHARACTER UPLO |
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| PARAMETER ( CONE = (1.0D+0, 0.0D+0) ) |
PARAMETER ( CONE = (1.0D+0, 0.0D+0) ) |
| * .. |
* .. |
| * .. Local Scalars .. |
* .. Local Scalars .. |
| LOGICAL UPPER |
LOGICAL UPPER |
| INTEGER N1, N2, IINFO |
INTEGER N1, N2, IINFO |
| DOUBLE PRECISION AJJ |
DOUBLE PRECISION AJJ |
| * .. |
* .. |
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| IF ( IINFO.NE.0 ) THEN |
IF ( IINFO.NE.0 ) THEN |
| INFO = IINFO |
INFO = IINFO |
| RETURN |
RETURN |
| END IF |
END IF |
| * |
* |
| * Compute the Cholesky factorization A = U**H*U |
* Compute the Cholesky factorization A = U**H*U |
| * |
* |
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| $ A( 1, 1 ), LDA, A( 1, N1+1 ), LDA ) |
$ A( 1, 1 ), LDA, A( 1, N1+1 ), LDA ) |
| * |
* |
| * Update and factor A22 |
* Update and factor A22 |
| * |
* |
| CALL ZHERK( UPLO, 'C', N2, N1, -ONE, A( 1, N1+1 ), LDA, |
CALL ZHERK( UPLO, 'C', N2, N1, -ONE, A( 1, N1+1 ), LDA, |
| $ ONE, A( N1+1, N1+1 ), LDA ) |
$ ONE, A( N1+1, N1+1 ), LDA ) |
| CALL ZPOTRF2( UPLO, N2, A( N1+1, N1+1 ), LDA, IINFO ) |
CALL ZPOTRF2( UPLO, N2, A( N1+1, N1+1 ), LDA, IINFO ) |
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