SRC/zhetrs_aa_2stage.f(3)

NAME
SRC/zhetrs_aa_2stage.f

SYNOPSIS

  Functions/Subroutines
subroutine zhetrs_aa_2stage (uplo, n, nrhs, a, lda, tb, ltb, ipiv, ipiv2, b, ldb, info)
ZHETRS_AA_2STAGE

Function/Subroutine Documentation

  subroutine zhetrs_aa_2stage (character uplo, integer n, integer nrhs, complex*16, dimension( lda, * ) a, integer lda, complex*16, dimension( * ) tb, integer ltb, integer, dimension( * ) ipiv, integer, dimension( * ) ipiv2, complex*16, dimension( ldb, * ) b, integer ldb, integer info)

ZHETRS_AA_2STAGE

Purpose:

     ZHETRS_AA_2STAGE solves a system of linear equations A*X = B with a
     hermitian matrix A using the factorization A = U**H*T*U or
     A = L*T*L**H computed by ZHETRF_AA_2STAGE.

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**H*T*U;
              = 'L':  Lower triangular, form is A = L*T*L**H.

    N

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

    NRHS

              NRHS is INTEGER
              The number of right hand sides, i.e., the number of columns
              of the matrix B.  NRHS >= 0.

    A

              A is COMPLEX*16 array, dimension (LDA,N)
              Details of factors computed by ZHETRF_AA_2STAGE.

    LDA

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

    TB

              TB is COMPLEX*16 array, dimension (LTB)
              Details of factors computed by ZHETRF_AA_2STAGE.

    LTB

              LTB is INTEGER
              The size of the array TB. LTB >= 4*N.

    IPIV

              IPIV is INTEGER array, dimension (N)
              Details of the interchanges as computed by
              ZHETRF_AA_2STAGE.

    IPIV2

              IPIV2 is INTEGER array, dimension (N)
              Details of the interchanges as computed by
              ZHETRF_AA_2STAGE.

    B

              B is COMPLEX*16 array, dimension (LDB,NRHS)
              On entry, the right hand side matrix B.
              On exit, the solution matrix X.

    LDB

              LDB is INTEGER
              The leading dimension of the array B.  LDB >= max(1,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.

Definition at line 139 of file zhetrs_aa_2stage.f.

Author

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