code: public static double elementMinAbs( DMatrix2 a ) {
          double min = Math.abs(a.a1);
          double tmp = Math.abs(a.a1); if( tmp < min ) min = tmp;
          tmp = Math.abs(a.a2); if( tmp < min ) min = tmp;
  
          return min;
      }
docs: <p>
  Returns the absolute value of the element in the vector that has the smallest absolute value.<br>
  <br>
  Min{ |a<sub>i</sub>| } for all i<br>
  </p>
  
  @param a A matrix. Not modified.
  @return The max element value of the vector.