private static boolean match(Instance x,int indices[],int values[]){
  for (int j=0; j < indices.length; j++) {
    int v=(int)Math.round(x.value(indices[j]));
    if (v != values[j]) {
      return false;
    }
  }
  return true;
}

private static boolean match ( Instance x , int indices [ ] , int values [ ] ) { for ( int j = 0 ; j < indices . length ; j ++ ) { int v = ( int ) Math . round ( x . value ( indices [ j ] ) ) ; if ( v != values [ j ] ) { return false ; } } return true ; }
delta ( x_1 , x_2 , x_3 = v_1 , v_2 , v_3 ) for j = 1 , 2 , 3 , k = 1 , 2 , 3 .
