SRC/dsytrs_aa_2stage.f(3)

NAME
SRC/dsytrs_aa_2stage.f

SYNOPSIS

  Functions/Subroutines
subroutine dsytrs_aa_2stage (uplo, n, nrhs, a, lda, tb, ltb, ipiv, ipiv2, b, ldb, info)
DSYTRS_AA_2STAGE

Function/Subroutine Documentation

  subroutine dsytrs_aa_2stage (character uplo, integer n, integer nrhs, double precision, dimension( lda, * ) a, integer lda, double precision, dimension( * ) tb, integer ltb, integer, dimension( * ) ipiv, integer, dimension( * ) ipiv2, double precision, dimension( ldb, * ) b, integer ldb, integer info)

DSYTRS_AA_2STAGE

Purpose:

     DSYTRS_AA_2STAGE solves a system of linear equations A*X = B with a real
     symmetric matrix A using the factorization A = U**T*T*U or
     A = L*T*L**T computed by DSYTRF_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**T*T*U;
              = 'L':  Lower triangular, form is A = L*T*L**T.

    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 DOUBLE PRECISION array, dimension (LDA,N)
              Details of factors computed by DSYTRF_AA_2STAGE.

    LDA

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

    TB

              TB is DOUBLE PRECISION array, dimension (LTB)
              Details of factors computed by DSYTRF_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
              DSYTRF_AA_2STAGE.

    IPIV2

              IPIV2 is INTEGER array, dimension (N)
              Details of the interchanges as computed by
              DSYTRF_AA_2STAGE.

    B

              B is DOUBLE PRECISION 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 137 of file dsytrs_aa_2stage.f.

Author

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