SRC/zsytrs2.f(3)           Library Functions Manual           SRC/zsytrs2.f(3)

NAME
       SRC/zsytrs2.f

SYNOPSIS
   Functions/Subroutines
       subroutine zsytrs2 (uplo, n, nrhs, a, lda, ipiv, b, ldb, work, info)
           ZSYTRS2

Function/Subroutine Documentation
   subroutine zsytrs2 (character uplo, integer n, integer nrhs, complex*16,
       dimension( lda, * ) a, integer lda, integer, dimension( * ) ipiv,
       complex*16, dimension( ldb, * ) b, integer ldb, complex*16, dimension(
       * ) work, integer info)
       ZSYTRS2

       Purpose:


            ZSYTRS2 solves a system of linear equations A*X = B with a complex
            symmetric matrix A using the factorization A = U*D*U**T or
            A = L*D*L**T computed by ZSYTRF and converted by ZSYCONV.

       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.

           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)
                     The block diagonal matrix D and the multipliers used to
                     obtain the factor U or L as computed by ZSYTRF.
                     Note that A is input / output. This might be counter-intuitive,
                     and one may think that A is input only. A is input / output. This
                     is because, at the start of the subroutine, we permute A in a
                     'better' form and then we permute A back to its original form at
                     the end.

           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.

           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).

           WORK

                     WORK is COMPLEX*16 array, dimension (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 130 of file zsytrs2.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

LAPACK                          Version 3.12.0                SRC/zsytrs2.f(3)