ZTPTTR(3)      LAPACK routine of NEC Numeric Library Collection      ZTPTTR(3)



NAME
       ZTPTTR

SYNOPSIS
       SUBROUTINE ZTPTTR (UPLO, N, AP, A, LDA, INFO)



PURPOSE
            ZTPTTR copies a triangular matrix A from standard packed format (TP)
            to standard full format (TR).




ARGUMENTS
           UPLO      (input)
                     UPLO is CHARACTER*1
                     = 'U':  A is upper triangular.
                     = 'L':  A is lower triangular.

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

           AP        (input)
                     AP is COMPLEX*16 array, dimension ( N*(N+1)/2 ),
                     On entry, the upper or lower triangular matrix A, packed
                     columnwise in a linear array. The j-th column of A is stored
                     in the array AP as follows:
                     if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
                     if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n.

           A         (output)
                     A is COMPLEX*16 array, dimension ( LDA, N )
                     On exit, the triangular matrix A.  If UPLO = 'U', the leading
                     N-by-N upper triangular part of A contains the upper
                     triangular part of the matrix A, and the strictly lower
                     triangular part of A is not referenced.  If UPLO = 'L', the
                     leading N-by-N lower triangular part of A contains the lower
                     triangular part of the matrix A, and the strictly upper
                     triangular part of A is not referenced.

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

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



LAPACK routine                  31 October 2017                      ZTPTTR(3)