SRC/csytrs2.f(3)           Library Functions Manual           SRC/csytrs2.f(3)

NAME
       SRC/csytrs2.f

SYNOPSIS
   Functions/Subroutines
       subroutine csytrs2 (uplo, n, nrhs, a, lda, ipiv, b, ldb, work, info)
           CSYTRS2

Function/Subroutine Documentation
   subroutine csytrs2 (character uplo, integer n, integer nrhs, complex,
       dimension( lda, * ) a, integer lda, integer, dimension( * ) ipiv,
       complex, dimension( ldb, * ) b, integer ldb, complex, dimension( * )
       work, integer info)
       CSYTRS2

       Purpose:


           !>
           !> CSYTRS2 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 CSYTRF and converted by CSYCONV.
           !>

       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 array, dimension (LDA,N)
           !>          The block diagonal matrix D and the multipliers used to
           !>          obtain the factor U or L as computed by CSYTRF.
           !>          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
           !>           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 CSYTRF.
           !>

           B

           !>          B is COMPLEX 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 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 csytrs2.f.

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

LAPACK                          Version 3.12.0                SRC/csytrs2.f(3)