csyconv-f(3)

csyconv.f –

Synopsis

Functions/Subroutines

subroutine csyconv (UPLO, WAY, N, A, LDA, IPIV, WORK, INFO)
CSYCONV

Function/Subroutine Documentation

subroutine csyconv (characterUPLO, characterWAY, integerN, complex, dimension( lda, * )A, integerLDA, integer, dimension( * )IPIV, complex, dimension( * )WORK, integerINFO)

CSYCONV

Purpose:

 CSYCONV convert A given by TRF into L and D and vice-versa.
 Get Non-diag elements of D (returned in workspace) and 
 apply or reverse permutation done in TRF.

Parameters:

UPLO

 UPLO is 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.

WAY

 WAY is CHARACTER*1
 = 'C': Convert 
 = 'R': Revert

 N is INTEGER
 The order of the matrix A. N >= 0.

 A is COMPLEX array, dimension (LDA,N)
 The block diagonal matrix D and the multipliers used to
 obtain the factor U or L as computed by CSYTRF.

LDA

 LDA is INTEGER
 The leading dimension of the array A. LDA >= max(1,N).

IPIV

 IPIV is INTEGER array, dimension (N)
 Details of the interchanges and the block structure of D
 as determined by CSYTRF.

WORK

 WORK is COMPLEX array, dimension (N)

INFO

 INFO is INTEGER
 = 0: successful exit
 < 0: if INFO = -i, the i-th argument had an illegal value

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2011

Definition at line 113 of file csyconv.f.

Author

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