??? à ??s? ?? rè???s ???s ??q????? ???????? ?? rés??t?ts ré???ts s??t r???r???és ?t ?r???és ??rr??ts ?? ??ç?? ?????r??? r????r??s? ?t s?????? ???s ??tr? r????str??t??? r??s???é?? ???s ?r??é???s ????? s??t? ???t ?????r? ???s ??tr????s??s ??s ???ss?s ?? t?é?r??s ??rt????t?s ???r ?? ????????s??? à s?? ???r ??s t?é?r??s ?? ???st?? ??? ???ss? ?? t?é?r??s ??té? ??? ?t ??s t?é?r??s ?? ???s???????? ??? ???ss? ?? t?é?r??s ??té? ????? ?t ?t???s??s ?? ???t q?? ??s t?é?? r??s ?? ???st?? s??t ??s t?é?r??s ?? ???s???????? ??rt?????èr?s ??? ???ss? ?? ?st ??? s??s????ss? ?? ????? ??tt? ???ss????t??? ???s ??è?? à ét????r tr??s s?é??r??s ??rsq?? ???? t?é?r??s s??t ??????é?s ? ??? ??s ???? s??t ??s t?é?r??s ???s ???? ??? ??s ???? s??t ??s t?é?r??s ???s ??? ??? ????? ?st ??? t?é?r?? ???s ?? ?t ????tr? ??? t?é?r?? ???s ???? ???s ??r????s??s ?? s??é??s ???s à ?? ??????r?té q??à ????????té? ??tr? s??t?ès? ??s s??é??s ?? ????????s?? s?rt ???s???rs ?????t??s? Pr???èr?? ???t? ?ê?? s? ??s rés??t?ts ?? s??t ??s ????????? ???s ???s??s q?? ??s ?rés??t?r ???s ?? ???r? ?????r?? ???t ???r??r ??? ré?ér???? ?? ?????r ???r ??s ??rs????s ??tér?ssé?s ??r ??s ?r???è??s ,
l = r) ???s? ?r?tt?? ?s l = r? ?s ? ????s?q????t?? ?? p ?s ?? n??r? ?r?????t? ,
s?t??? ??t?r?? ?s ??t ?? ?ts ???t? ?s 0 ?r 1? ? ????t??? ??t?r?? ?s ??t ?? ?ts ???t? ?s 0? ? ???s??q????t? ??t???? t?? ??r?????s ?sr???s? ?r?? t?? str??t?r? ?? ??t?r?s t? M? ??s? ????t?? ?? ? ??? ? s????t ???s? ?? ??t?t????? ?? ?r?t? |= ? M ? ???? t?? ????r???? ? ?s tr?? ?? t?? ??str??t?r? M ????r t?? ??r????? ?ss??????t ?? ?? ??s? s?? t??t ? s?t?s??s ? ,
?r T 1 ? T 2 ? ?? ?r??r t? ???? ????? ??s?? ????r?t??s ?r? ????????? ??r T 1 ??? T 2 ??? ???t ?r? t?? ?ss???t???s ?? T 1 ??? T 2 ? t?? ,
?ss?? t???r??s s?t?s????? t??s? t?? r?q??r????ts ?r? ?????? ??? ??? ??tt?r ?ss???s t??t t???r??s ????t ?r?????r?s ??r r????? ??? t?r?s t? ????????? ??r?s ?????????rs? ??? ????r?t??s ??r s?????? ?q??t???s ?s????rs?? t???r??s ,
r ?? t???r??s? t???t??r ??t? t?? ??s?r??t??? t??t t?? t???r? ?? ?q????t? ????q??t??s ,
?? ?r???? ?r?s??t t?? ??t???????? t? ????? s?t?s??????t? ?r?????r?s ?? ?s??? ? s?t?r?t??? ???????s? ????? ?? s??? ??? t??s s?t?r?t??? ???????s ??? ?? ?s?? t? ??r??? ?????t??? ??????t? s?t?s??????t? ?r?????r?s? ?? ???s???r??? s????ss????? t?? t???r? ?? ?q????t? ??? t?? t???r? ?? ??sts??t???ss? ??? ??s??? ?? s?t?r?t??????s?? s?t?s??????t? ?r?????r?s ??? ??r???t??? ?? s?t?s??????t? ?r?????r?s ??s?? ?? s?t?r?t??? ??r?s ?s ,
t?? ??t? t?? ??t????? ??????t?r? ?q????t??s? ?? ??t? ?r? s?t?s????? ?? t?? ?t??r t???r?? t?? t?? r?s???t??? ?????s ??? ??r?? ?? t?? s??? ??r??????t?? ,
?s ?? t???r??s s??r??? ? s??t???r? s?t?s????? ?r???rt??s r???t?? t? t?? q???? t???r ???????t??? ?r?????? ??? r???t?? ?r?????r? ??r?s s?????r?? t? t?? ??? ?? ???s???????? ?? t?? s??s? t??t ?t ?s ??s?? ?? t?? ???????? ?? ??t????? ??s? ?t??? ????s?s ???r?ss?? ???r t?? s??r?? s????t?r?? ??? ?????r?? ??t??? r????s ,
? t???r??s T 1 , T 2 ?? s????t?r?s ? 1 , ? 2 s??? t??t? ?? ??t? T 1 , T 2 ???? ????????? s?t?s??????t? ?r?????? ?? t??r? ?s s?? ,
???s?s ????s t??t? ??r ???r? s?t ? i ?? ?r???? ? a i ???t?r??s? ?t ?s ??ss???? t ,
x) = 0 ?x, y s(x) = s(y) ? x = y ?x x = t(x) ??r ??? t?? t?r?s t(x ,
y s(x) = s(y) ? x = y ?x x = t(x) ??r ??? t?? t?r?s t(x) ???r ? I t??t ?r ,
s????rs ?t ?s ? ??t s?r?r?s??? t? s?? t??t ?q??t????? r??s????? t???s ???? r?t??r ??? ???????t???s ?? t?? ???t??t ?? ???? ??s??t? t?? ?r????? ??t?r?st ?? ?q??t????? t???r?? ?r???rs ??????????????????????????????? t??r? ?s ? ,