code: public static double elementMax( DMatrix5x5 a ) {
          double max = a.a11;
          if( a.a12 > max ) max = a.a12;
          if( a.a13 > max ) max = a.a13;
          if( a.a14 > max ) max = a.a14;
          if( a.a15 > max ) max = a.a15;
          if( a.a21 > max ) max = a.a21;
          if( a.a22 > max ) max = a.a22;
          if( a.a23 > max ) max = a.a23;
          if( a.a24 > max ) max = a.a24;
          if( a.a25 > max ) max = a.a25;
          if( a.a31 > max ) max = a.a31;
          if( a.a32 > max ) max = a.a32;
          if( a.a33 > max ) max = a.a33;
          if( a.a34 > max ) max = a.a34;
          if( a.a35 > max ) max = a.a35;
          if( a.a41 > max ) max = a.a41;
          if( a.a42 > max ) max = a.a42;
          if( a.a43 > max ) max = a.a43;
          if( a.a44 > max ) max = a.a44;
          if( a.a45 > max ) max = a.a45;
          if( a.a51 > max ) max = a.a51;
          if( a.a52 > max ) max = a.a52;
          if( a.a53 > max ) max = a.a53;
          if( a.a54 > max ) max = a.a54;
          if( a.a55 > max ) max = a.a55;
  
          return max;
      }
docs: <p>
  Returns the value of the element in the matrix that has the largest value.<br>
  <br>
  Max{ a<sub>ij</sub> } for all i and j<br>
  </p>
  
  @param a A matrix. Not modified.
  @return The max element value of the matrix.