μu1039??£oμuèy°u??ê?°???°?·?à′??£??aè?±3?°£?(1)
??iu??1???°?è¨?uod?′?-di?é2?μ??′????
?-o?x?è?ê?ot2?μ?3?ii?′μàè?μ?èa£?oèii?′μàè?μ??a?£
ii?′μàè?éiooμ?à?x?£?oo?a??ouáéêˉμ????yá·?eμ¤ê§°u£??ao??-ê?ii?′?oè??????aμ?ê??é?£
??odê2?′ê??é£?±è?a?tê??é?u?u′ii′ii?′μàè?μ?d??£???????e′?ê?£?ii?′μàè??iotμ??à?u?÷?÷£??§??io??£??oè??1??od??μ??a??±?1ê?£
?uo?ii?′μàè?2??á2?1?éi·y£?μ?′|?°?o?-o?μ?xu?££????oo?3?ê??iê?′?x?1??o????μ?ê???£?oa???-o?oyoy?????£
???é?3??μ?dtê?£???o???o?ê?d??uè?è???±2£??-o?x?è?o2?u′o??μ?2?3?o????á1?£?è′2??é?u??μ?è?′???é?£????????£
???o???u£?????μ?ê?i??i°u·??u?-o?éi±?£??tê±?t?i2?è?o?±uà?èd£?o?±uá?áé?ê???u?d??μ?à?èd£??ox??-o?d??à′iè¥?£?d?±μ±?d£??-o?£???o???éi?uo???dt?t?ao£μ±?d?£
?°ii?′μàè?£????aê?′o?÷±¨?′£??ioo?a?o?u??ii?′?o??????á?±|±′£????i??2??eoa£?oadd??é±è??á±|μ?ê??é£?°x1??uê¥?·??μ?áéêˉ£?1?à?xo?¨ê?£??±
????±?oi£??u??·??-£??-o????d??x??od?áéé?′|?iáoμ?éyiu?eo?i?dudu?e??£???o?oa??????iiμ?·ué?£?3¤·¢?o?è£?i?1ao§è?£?é???oo±?2o2oéu??£?ê¥?ào?dxé·μ?????£?i?ê±3????u?-o?éié??£
?°?-o?£????o?à£??±
ii?′μàè?éi?a???é?3??μ?è???£?ê2?′ê±oo±?è?è?′?èè??1y£?oyoy′oá31y£?o???à′x?áé?êé?′|μ?i′?d£??eà±à±μ?£?à?à?μ??°o?μ±?d£?é±oaè?μ??£
?°?-?o?à?12?o??¨£???à?xo1?μ°£??±
é?é??′á?????o???£??-o??iè??i±??e·¢??£?duo??i?è£?o???è??iμ?????1?1?μ′μ′£??yá·io·?£?o???xo?i??áoμ?è?2?′oé???oo±?μ±?dà?é¢3?à′£?????????£???????iiμ?3?è??u£??i·?·eoa??á?iiμ?o?°??£
????o?3?£??uodμ?é¢dt??′o′oμ???xi°i??′o£?o????°o2?μ2?3?à′£?31μx′?x??£
?-?u??μ?£?é???oo±?£??u???-o?μ?????à?′oèy±?£?è?′??¨o?£???2à£????éêˉ????μ?????£?iêè?μ??2á??uodè?μ?3£ê??£
?¨o?μ?????£??u?-o?μ?????????£??ˉ?ao???i¨iiμ??t′o°xé?ê???£?ieè?iiê?£???????iiμ??o???uê??d£??ox?ii?′μàè?x¥è¥£?o§è?d?é??£
?-o?iêè??yè?á?·è??£??yè?á??¨o?é±?uμ±?d£?????2???£??oè??i??oa???èx??????o?éii?′μàè??£
?°?-o?£????aê?2??a?à??£???o??a???è?o′oμ?????£??i?u???ox??o?e£??a????·¨£??′?ao2i?ox?éá?o?d?£?′oμà??3?£?ii?iμ?°μ£?dé?t1é′|£?ê??a??i·?£ii?′?i??£??±
?é?é£??é?é£??é?é?é?é?é?é?-?-
?uê±????£?????iiμ???±?o?1é?t±èo?à?μ????¢3?è??u£?o???xo?·?1???édé??£?′o????°?·??ox??-o??·?1?£
??iu??1???°?è¨?uod?′?-di?é2?μ??′????
?-o?x?è?ê?ot2?μ?3?ii?′μàè?μ?èa£?oèii?′μàè?μ??a?£
ii?′μàè?éiooμ?à?x?£?oo?a??ouáéêˉμ????yá·?eμ¤ê§°u£??ao??-ê?ii?′?oè??????aμ?ê??é?£
??odê2?′ê??é£?±è?a?tê??é?u?u′ii′ii?′μàè?μ?d??£???????e′?ê?£?ii?′μàè??iotμ??à?u?÷?÷£??§??io??£??oè??1??od??μ??a??±?1ê?£
?uo?ii?′μàè?2??á2?1?éi·y£?μ?′|?°?o?-o?μ?xu?££????oo?3?ê??iê?′?x?1??o????μ?ê???£?oa???-o?oyoy?????£
???é?3??μ?dtê?£???o???o?ê?d??uè?è???±2£??-o?x?è?o2?u′o??μ?2?3?o????á1?£?è′2??é?u??μ?è?′???é?£????????£
???o???u£?????μ?ê?i??i°u·??u?-o?éi±?£??tê±?t?i2?è?o?±uà?èd£?o?±uá?áé?ê???u?d??μ?à?èd£??ox??-o?d??à′iè¥?£?d?±μ±?d£??-o?£???o???éi?uo???dt?t?ao£μ±?d?£
?°ii?′μàè?£????aê?′o?÷±¨?′£??ioo?a?o?u??ii?′?o??????á?±|±′£????i??2??eoa£?oadd??é±è??á±|μ?ê??é£?°x1??uê¥?·??μ?áéêˉ£?1?à?xo?¨ê?£??±
????±?oi£??u??·??-£??-o????d??x??od?áéé?′|?iáoμ?éyiu?eo?i?dudu?e??£???o?oa??????iiμ?·ué?£?3¤·¢?o?è£?i?1ao§è?£?é???oo±?2o2oéu??£?ê¥?ào?dxé·μ?????£?i?ê±3????u?-o?éié??£
?°?-o?£????o?à£??±
ii?′μàè?éi?a???é?3??μ?è???£?ê2?′ê±oo±?è?è?′?èè??1y£?oyoy′oá31y£?o???à′x?áé?êé?′|μ?i′?d£??eà±à±μ?£?à?à?μ??°o?μ±?d£?é±oaè?μ??£
?°?-?o?à?12?o??¨£???à?xo1?μ°£??±
é?é??′á?????o???£??-o??iè??i±??e·¢??£?duo??i?è£?o???è??iμ?????1?1?μ′μ′£??yá·io·?£?o???xo?i??áoμ?è?2?′oé???oo±?μ±?dà?é¢3?à′£?????????£???????iiμ?3?è??u£??i·?·eoa??á?iiμ?o?°??£
????o?3?£??uodμ?é¢dt??′o′oμ???xi°i??′o£?o????°o2?μ2?3?à′£?31μx′?x??£
?-?u??μ?£?é???oo±?£??u???-o?μ?????à?′oèy±?£?è?′??¨o?£???2à£????éêˉ????μ?????£?iêè?μ??2á??uodè?μ?3£ê??£
?¨o?μ?????£??u?-o?μ?????????£??ˉ?ao???i¨iiμ??t′o°xé?ê???£?ieè?iiê?£???????iiμ??o???uê??d£??ox?ii?′μàè?x¥è¥£?o§è?d?é??£
?-o?iêè??yè?á?·è??£??yè?á??¨o?é±?uμ±?d£?????2???£??oè??i??oa???èx??????o?éii?′μàè??£
?°?-o?£????aê?2??a?à??£???o??a???è?o′oμ?????£??i?u???ox??o?e£??a????·¨£??′?ao2i?ox?éá?o?d?£?′oμà??3?£?ii?iμ?°μ£?dé?t1é′|£?ê??a??i·?£ii?′?i??£??±
?é?é£??é?é£??é?é?é?é?é?é?-?-
?uê±????£?????iiμ???±?o?1é?t±èo?à?μ????¢3?è??u£?o???xo?·?1???édé??£?′o????°?·??ox??-o??·?1?£