syconv(3)                  Library Functions Manual                  syconv(3)

NAME
       syconv - syconv: convert to/from L and D from hetrf

SYNOPSIS
   Functions
       subroutine csyconv (uplo, way, n, a, lda, ipiv, e, info)
           CSYCONV
       subroutine dsyconv (uplo, way, n, a, lda, ipiv, e, info)
           DSYCONV
       subroutine ssyconv (uplo, way, n, a, lda, ipiv, e, info)
           SSYCONV
       subroutine zsyconv (uplo, way, n, a, lda, ipiv, e, info)
           ZSYCONV

Detailed Description
Function Documentation
   subroutine csyconv (character uplo, character way, integer n, complex,
       dimension( lda, * ) a, integer lda, integer, dimension( * ) ipiv,
       complex, dimension( * ) e, integer info)
       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

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

           A

           !>          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.
           !>

           E

           !>          E is COMPLEX array, dimension (N)
           !>          E stores the supdiagonal/subdiagonal of the symmetric 1-by-1
           !>          or 2-by-2 block diagonal matrix D in LDLT.
           !>

           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.

       Definition at line 113 of file csyconv.f.

   subroutine dsyconv (character uplo, character way, integer n, double
       precision, dimension( lda, * ) a, integer lda, integer, dimension( * )
       ipiv, double precision, dimension( * ) e, integer info)
       DSYCONV

       Purpose:


           !>
           !> DSYCONV 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

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

           A

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

           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 DSYTRF.
           !>

           E

           !>          E is DOUBLE PRECISION array, dimension (N)
           !>          E stores the supdiagonal/subdiagonal of the symmetric 1-by-1
           !>          or 2-by-2 block diagonal matrix D in LDLT.
           !>

           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.

       Definition at line 113 of file dsyconv.f.

   subroutine ssyconv (character uplo, character way, integer n, real,
       dimension( lda, * ) a, integer lda, integer, dimension( * ) ipiv, real,
       dimension( * ) e, integer info)
       SSYCONV

       Purpose:


           !>
           !> SSYCONV 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

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

           A

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

           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 SSYTRF.
           !>

           E

           !>          E is REAL array, dimension (N)
           !>          E stores the supdiagonal/subdiagonal of the symmetric 1-by-1
           !>          or 2-by-2 block diagonal matrix D in LDLT.
           !>

           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.

       Definition at line 113 of file ssyconv.f.

   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

       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
           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

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

           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.
           !>

           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 ZSYTRF.
           !>

           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.
           !>

           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.

       Definition at line 113 of file zsyconv.f.

Author
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LAPACK                          Version 3.12.0                       syconv(3)