docs: public static void divide( DMatrix6 a , double alpha , DMatrix6 b ) {
          b.a1 = a.a1/alpha;
          b.a2 = a.a2/alpha;
          b.a3 = a.a3/alpha;
          b.a4 = a.a4/alpha;
          b.a5 = a.a5/alpha;
          b.a6 = a.a6/alpha;
      }