ssytrs_aa_2stage.f(3)

NAME
ssytrs_aa_2stage.f

SYNOPSIS

  Functions/Subroutines
subroutine ssytrs_aa_2stage (UPLO, N, NRHS, A, LDA, TB, LTB, IPIV, IPIV2, B, LDB, INFO)
SSYTRS_AA_2STAGE

Function/Subroutine Documentation

  subroutine ssytrs_aa_2stage (character UPLO, integer N, integer NRHS, real, dimension( lda, * ) A, integer LDA, real, dimension( * ) TB, integer LTB, integer, dimension( * ) IPIV, integer, dimension( * ) IPIV2, real, dimension( ldb, * ) B, integer LDB, integer INFO)

Purpose:

     SSYTRS_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 SSYTRF_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 REAL array, dimension (LDA,N)
              Details of factors computed by SSYTRF_AA_2STAGE.

    LDA

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

    TB

              TB is REAL array, dimension (LTB)
              Details of factors computed by SSYTRF_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
              SSYTRF_AA_2STAGE.

    IPIV2

              IPIV2 is INTEGER array, dimension (N)
              Details of the interchanges as computed by
              SSYTRF_AA_2STAGE.

    B

              B is REAL 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 ssytrs_aa_2stage.f.

Author

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