docs: public static double elementSumSq( DMatrixD1 m  ) {
  
          // minimize round off error
          double maxAbs = CommonOps_DDRM.elementMaxAbs(m);
          if( maxAbs == 0)
              return 0;
  
          double total = 0;
          
          int N = m.getNumElements();
          for( int i = 0; i < N; i++ ) {
              double d = m.data[i]/maxAbs;
              total += d*d;
          }
  
          return maxAbs*total*maxAbs;
      }