zsyconv()

subroutine zsyconv	(	character	uplo,
		character	way,
		integer	n,
		complex*16, dimension( lda, * )	a,
		integer	lda,
		integer, dimension( * )	ipiv,
		complex*16, dimension( * )	e,
		integer	info )

ZSYCONV

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Purpose:

!>
!> ZSYCONV converts A given by ZHETRF into L and D or vice-versa.
!> Get nondiagonal elements of D (returned in workspace) and
!> apply or reverse permutation done in TRF.
!> 

Parameters

[in]	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. !>
[in]	WAY	!> WAY is CHARACTER*1 !> = 'C': Convert !> = 'R': Revert !>
[in]	N	!> N is INTEGER !> The order of the matrix A. N >= 0. !>
[in,out]	A	!> A is COMPLEX*16 array, dimension (LDA,N) !> The block diagonal matrix D and the multipliers used to !> obtain the factor U or L as computed by ZSYTRF. !>
[in]	LDA	!> LDA is INTEGER !> The leading dimension of the array A. LDA >= max(1,N). !>
[in]	IPIV	!> IPIV is INTEGER array, dimension (N) !> Details of the interchanges and the block structure of D !> as determined by ZSYTRF. !>
[out]	E	!> E is COMPLEX*16 array, dimension (N) !> E stores the supdiagonal/subdiagonal of the symmetric 1-by-1 !> or 2-by-2 block diagonal matrix D in LDLT. !>
[out]	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.