CLANSY  -  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

       REAL FUNCTION CLANSY( NORM, UPLO, N, A, LDA, WORK )

           CHARACTER NORM, UPLO

           INTEGER   LDA, N

           REAL      WORK( * )

           COMPLEX   A( LDA, * )


PURPOSE

       CLANSY 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

       CLANSY returns the value

          CLANSY = ( 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  CLANSY  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

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


       A       (input) COMPLEX 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) REAL array, dimension (LWORK),
               where  LWORK  >=  N when NORM = 'I' or '1' or 'O';
               otherwise, WORK is not referenced.


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