ZLANSY  -  return the value of the one norm, or the Frobe­
       nius norm, or the infinity norm, or the element of largest
       absolute value of a complex symmetric matrix A


SYNOPSIS

       DOUBLE PRECISION FUNCTION  ZLANSY(  NORM, UPLO, N, A, LDA,
                        WORK )

           CHARACTER    NORM, UPLO

           INTEGER      LDA, N

           DOUBLE       PRECISION WORK( * )

           COMPLEX*16   A( LDA, * )


PURPOSE

       ZLANSY returns the value of the one norm, or the Frobenius
       norm,  or  the  infinity  norm,  or the element of largest
       absolute value of a complex symmetric matrix A.


DESCRIPTION

       ZLANSY returns the value

          ZLANSY = ( max(abs(A(i,j))), NORM = 'M' or 'm'
                   (
                   ( norm1(A),         NORM = '1', 'O' or 'o'
                   (
                   ( normI(A),         NORM = 'I' or 'i'
                   (
                   ( normF(A),         NORM = 'F',  'f',  'E'  or
       'e'

       where   norm1   denotes the  one norm of a matrix (maximum
       column sum), normI   denotes  the   infinity  norm   of  a
       matrix   (maximum  row sum) and normF  denotes the  Frobe­
       nius norm of a matrix (square root  of  sum  of  squares).
       Note that  max(abs(A(i,j)))  is not a  matrix norm.


ARGUMENTS

       NORM    (input) CHARACTER*1
               Specifies  the  value  to be returned in ZLANSY as
               described above.

       UPLO    (input) CHARACTER*1
               Specifies whether the upper  or  lower  triangular
               part  of  the  symmetric  matrix A is to be refer­
               enced.  = 'U':  Upper triangular part of A is ref­
               erenced
               = 'L':  Lower triangular part of A is referenced

               The  order  of the matrix A.  N >= 0.  When N = 0,
               ZLANSY is set to zero.

       A       (input) COMPLEX*16 array, dimension (LDA,N)
               The symmetric matrix A.  If UPLO = 'U', the  lead­
               ing 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 refer­
               enced.  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  tri­
               angular part of A is not referenced.

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

       WORK    (workspace) DOUBLE PRECISION array, dimension
               (LWORK),
               where  LWORK  >=  N when NORM = 'I' or '1' or 'O';
               otherwise, WORK is not referenced.


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