LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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zsyconv.f File Reference

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Functions/Subroutines

subroutine zsyconv (UPLO, WAY, N, A, LDA, IPIV, WORK, INFO)
 ZSYCONV More...
 

Function/Subroutine Documentation

subroutine zsyconv ( character  UPLO,
character  WAY,
integer  N,
complex*16, dimension( lda, * )  A,
integer  LDA,
integer, dimension( * )  IPIV,
complex*16, dimension( * )  WORK,
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]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]WORK
          WORK is COMPLEX*16 array, dimension (N)
[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.
Date
November 2011

Definition at line 113 of file zsyconv.f.

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