μu780??￡oμu?t°u?tê?o???μ?μxé??¨￡?ê?°?2?(3)
??iu??1???°?è¨?uod?′?-di?é2?μ??′????
1?2???è?￡?o???μ??a?uμ??é??￡????é·oè?o2??o?x?3?·?±?μ?′o???￡o?′?i?ê±￡???ê??o?è￡?o??é?éo?o?êˉ??x÷??3éμ?′?o?·??i·éμ?á??uè?μ?ê??d?￡
??ou?a?uμ????¨￡???odè?odoioé?￡
±??1???é·oè???ê??a′?dd?ˉμ?áii·è?￡?o2ê?3???3?á|μ??°′oà?°??±￡?odè¨à????¨2éo?ê2?′?uμ?·?ê?￡?ê2?′?uμ?·?·¨?￡
??è???2??ioai?è?????￡?
éi?ao?·?′oàd￡?è?ê?á??a??d?ot????od￡?o2?i2?±??u?a??è|xoà??i??è￥á??￡
?°?èè?·oè?è?′?°2??￡??oμèo2x?è?oaiy′o?￡??è?′?ê±?t·¨?do|μ?è?o?1???μ?????￡?μ??è?°è′o2?aμàè?o?1????u??·?￡??u?o?ué??¨ê?°?2?′o??μ?o￡oo￡??oμè?i?èddo?2?á??￡?±
?uê±￡??iod????3¤à??ox????é·oè?±§è-??±e￡??ˉx÷??μàá÷d???ê§?u??·??￡
?°?o??o2??±eá?￡??±
?°°￠??io·e￡?·oè?￡?±￡??￡??±
?°·oè?￡??-o?￡??oo2x?á??￡?±?aê±￡?iidto2x??ˉ3?à′￡?à?x????°?oè??1oi?-o?′ox??do??￡
?°?-o?￡??????′°i￡?ê?oi?oo??ex?￡??1ê?oi???§xuμ????io??ex?￡??±?uiid??a?u?êμà?￡
?°x?è?ê?oi?ud?x?á??￡·oè?￡????ià?oˉ￡??-o??èddo?2?á?￡??±
?-o?xi??o?d|￡?oi3￡1§?′μ???x?o???xoddà?￡???ooo22?1uo???xoμ?·′o|￡???o??e?do￡o?μ?′oé?i¨￡??i?ê?è?ox?dé??μ±?dx??ˉ????è￥?￡
?-o?x?μ?oi3￡?o?y￡??i·?·eê?3?±￥oèx???oo?ux??oi￥?o?d1?o?°?￡?è′′?x?o??o·?éuo?d￥￡?o?2??§à?￡??2???i??ê§?uo???xoo????é·oè?μ????°?￡
??iu??1???°?è¨?uod?′?-di?é2?μ??′????
1?2???è?￡?o???μ??a?uμ??é??￡????é·oè?o2??o?x?3?·?±?μ?′o???￡o?′?i?ê±￡???ê??o?è￡?o??é?éo?o?êˉ??x÷??3éμ?′?o?·??i·éμ?á??uè?μ?ê??d?￡
??ou?a?uμ????¨￡???odè?odoioé?￡
±??1???é·oè???ê??a′?dd?ˉμ?áii·è?￡?o2ê?3???3?á|μ??°′oà?°??±￡?odè¨à????¨2éo?ê2?′?uμ?·?ê?￡?ê2?′?uμ?·?·¨?￡
??è???2??ioai?è?????￡?
éi?ao?·?′oàd￡?è?ê?á??a??d?ot????od￡?o2?i2?±??u?a??è|xoà??i??è￥á??￡
?°?èè?·oè?è?′?°2??￡??oμèo2x?è?oaiy′o?￡??è?′?ê±?t·¨?do|μ?è?o?1???μ?????￡?μ??è?°è′o2?aμàè?o?1????u??·?￡??u?o?ué??¨ê?°?2?′o??μ?o￡oo￡??oμè?i?èddo?2?á??￡?±
?uê±￡??iod????3¤à??ox????é·oè?±§è-??±e￡??ˉx÷??μàá÷d???ê§?u??·??￡
?°?o??o2??±eá?￡??±
?°°￠??io·e￡?·oè?￡?±￡??￡??±
?°·oè?￡??-o?￡??oo2x?á??￡?±?aê±￡?iidto2x??ˉ3?à′￡?à?x????°?oè??1oi?-o?′ox??do??￡
?°?-o?￡??????′°i￡?ê?oi?oo??ex?￡??1ê?oi???§xuμ????io??ex?￡??±?uiid??a?u?êμà?￡
?°x?è?ê?oi?ud?x?á??￡·oè?￡????ià?oˉ￡??-o??èddo?2?á?￡??±
?-o?xi??o?d|￡?oi3￡1§?′μ???x?o???xoddà?￡???ooo22?1uo???xoμ?·′o|￡???o??e?do￡o?μ?′oé?i¨￡??i?ê?è?ox?dé??μ±?dx??ˉ????è￥?￡
?-o?x?μ?oi3￡?o?y￡??i·?·eê?3?±￥oèx???oo?ux??oi￥?o?d1?o?°?￡?è′′?x?o??o·?éuo?d￥￡?o?2??§à?￡??2???i??ê§?uo???xoo????é·oè?μ????°?￡