????? ???????? ???????????????????? ??????? ???????????? ?????-edge ???????? ??? ??????? ??????? ?????????????? ?? . ?????????, 1 ????? ?????????? analyze pointed out ??? ??????? ?????????? ?????????????????? ????????? ???????????? ?????????? ??????? ??? ??????? ??? ?????????? ???????????????? ???? ?????? 2 ?????????? ( 9) ?????????????? ?????????