ZHPTRS(3f)               LAPACK routine (version 3.1)               ZHPTRS(3f)



NAME
       ZHPTRS - a system of linear equations A*X = B with a complex Hermitian
       matrix A stored in packed format using the factorization A = U*D*U**H
       or A = L*D*L**H computed by ZHPTRF

SYNOPSIS
       SUBROUTINE ZHPTRS( UPLO, N, NRHS, AP, IPIV, B, LDB, INFO )

           CHARACTER      UPLO

           INTEGER        INFO, LDB, N, NRHS

           INTEGER        IPIV( * )

           COMPLEX*16     AP( * ), B( LDB, * )

PURPOSE
       ZHPTRS solves a system of linear equations A*X = B with a complex
       Hermitian matrix A stored in packed format using the factorization A =
       U*D*U**H or A = L*D*L**H computed by ZHPTRF.


ARGUMENTS
       UPLO    (input) 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**H;
               = 'L':  Lower triangular, form is A = L*D*L**H.

       N       (input) INTEGER
               The order of the matrix A.  N >= 0.

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

       AP      (input) COMPLEX*16 array, dimension (N*(N+1)/2)
               The block diagonal matrix D and the multipliers used to obtain
               the factor U or L as computed by ZHPTRF, stored as a packed
               triangular matrix.

       IPIV    (input) INTEGER array, dimension (N)
               Details of the interchanges and the block structure of D as
               determined by ZHPTRF.

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

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

       INFO    (output) INTEGER
               = 0:  successful exit
               < 0: if INFO = -i, the i-th argument had an illegal value



 LAPACK routine (version 3.1)    November 2006                      ZHPTRS(3f)
