code: public static void elementDiv( DMatrix3 a , DMatrix3 b , DMatrix3 c ) {
          c.a1 = a.a1/b.a1;
          c.a2 = a.a2/b.a2;
          c.a3 = a.a3/b.a3;
      }
docs: <p>Performs an element by element division operation:<br>
  <br>
  c<sub>i</sub> = a<sub>i</sub> / b<sub>i</sub> <br>
  </p>
  @param a The left vector in the division operation. Not modified.
  @param b The right vector in the division operation. Not modified.
  @param c Where the results of the operation are stored. Modified.