LE PRECISION array, dimension
                         (LDFG, N/2+1)
          On entry, the leading N/2-by-N/2 lower triangular part of
          this array must contain the lower triangular part of the
          symmetric matrix G, and the N/2-by-N/2 upper triangular
          part of the submatrix in the columns 2 to N/2+1 of this
          array must contain the upper triangular part of the
          symmetric matrix F.
          On exit, if COMPQ = 'C', the leading N/2-by-N/2 part of
          the subm