zsyconv.f man page

zsyconv.f

Synopsis

Functions/Subroutines

subroutine zsyconv (UPLO, WAY, N, A, LDA, IPIV, E, INFO)
ZSYCONV

Function/Subroutine Documentation

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.

Date:

December 2016

Definition at line 116 of file zsyconv.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Referenced By

The man page zsyconv(3) is an alias of zsyconv.f(3).

Tue Nov 14 2017 Version 3.8.0 LAPACK