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Asymmetry and leapfrogging in a step-by-step R&D-race

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(8) 2. @?_ L?*) ðu E%c +ä 5 EK3• ä E%c +äë W| ðt T@h| Lu tL4i t)44i|hðU i^ýð*ðMhðý4 ðu @?_ L?*) ðu E%c +ä 5 K3• E%c +äë îit| hitTL?tit E%c +ä ' K E7 %c +7ä ð? Týhi •@h!Lñ t|h@|i}ðit uLh |üi +:#íh@Ui @hi }ðñi? M) |üi i^ý@|ðL?t Eôäë N?_ih |üi ?@|ýh@* @ttý4T|ðL?t |ü@| Z• : Zf EThL€|t Lu @ *i@_ih @hi t|hðU|*) üð}üih |ü@? |üLti Lu @ €h4 |ü@| ðt ?iU!í|Lí?iU!äc @?_ Zf è Z3• c uLh @?) Mit| hitTL?ti E%c +ä 5 U2n |L E7 %c +7ä 5 U2n êi 4ýt| ü@ñi % : f @?_ + : fc ðëië E%c +ä 5 U2nn ë Aüi ð?ñihti hitTL?ti 4@T K3• G U2nn $ U2 ðt |üi? }ðñi? M) tL*ñð?} Eôä uLh %7 @?_ +7c ý ü %7 ' ä ý å n %2 *2 ý + 2 *2 *+ ý rc EDä ý ü +7 ' ä ý + 2 *2 ý +r *% ý ré ûL|i |ü@| uLh *@h}i % Lh + |üi ð4@}it %7 Lh +7 4@) Mi ?i}@|ðñië Aüðt tð4T*) 4i@?t |ü@| |üðt E%c +ä ðt ?L| @ Mit| hitTL?ti |L @?) ui@tðM*i Eðëië ?L?í ?i}@|ðñiä t|h@|i}) Lu |üi L|üih €h4ë AüihiuLhic E%c +ä ðt @ Mit| hitTL?ti |L tL4i ui@tðM*i t|h@|i}) M) |üi L|üih €h4 ðu @?_ L?*) ðu K3• E%c +ä è fë. ôë2. Aüi Bh@TüðU@* 5L*ý|ðL?. Aüi € i_ TLð?| UL?_ð|ðL? L? Týhi •@h!Lñ TihuiU| i^ýð*ðMhðý4 t|h@|ií 2 2 }ðitc E%c +ä 5 EK3• ä E%c +äc ðt t|ð** _ðæUý*| |L ñðtý@*ð3ic tð?Ui EK3• ä ðt @ 4@T êð|ü @ uLýhí_ð4i?tðL?@* }h@Tüë Aüi t@4i ðt |hýi uLh |üi € i_ TLð?| UL?_ð|ðL? L? t)44i|hðU i^ýð*ðMhð@c E%c +ä 5 K3• E%c +äë Aüi) U@? Mi <tL*ñi_< ?ý4ihðU@**)c Mý| |üðt ðt *ð||*i ð?|ýð|ðñic @?_ @*tL |üihi ðt ?L }ý@h@?|ii |ü@| @** tL*ý|ðL?t @hi uLý?_ë `i |üihiuLhi ThLTLti @ }h@Tüðí U@* tL*ý|ðL? êüihi |üi € i_ TLð?|t U@? Mi ñðtý@*ð3i_ ð? |êLí_ð4i?tðL?@* 2 tT@Uië wi| 8 Mi ið|üih L?i Lu |üi 4@Tt EK3• ä Lh K3• c @?_ *i| 8 ' E8% c 8+ äc êüihi 8% c 8+ G U2n $ Un ë Aü@| ðtc ðu 8 E%c +ä ' E7 %c +7äc |üi? 8% E%c +ä ' % 7c @?_ 8+ E%c +ä ' +7ë Aüi € i_ TLð?| UL?_ð|ðL? E%c +ä ' 8 E%c +ä U@? |üi? Mi i Thitti_ i^ýðñ@*i?|*) M) |üi |êL UL?_ð|ðL?t % ' 8% E%c +ä @?_ + ' 8+ E%c +äë Aüiti _itUhðMi |êL Uýhñit ð? U2n c @?_ i^ýð*ðMhðý4 t|h@|ií }ðit U@? Mi uLý?_ @| |üiðh ð?|ihtiU|ðL?të #i?L|i M) ø•% @?_ ø•+ |üi Uýhñit Tih|@ð?ð?} |L 8 ' K3• EuLh t)44i|hðU i^ýð*ðMhð@äc @?_ M) ø2% @?_ ø2+ |üi 2 Uýhñit Tih|@ð?ð?} |L 8 ' EK3• ä E@** i^ýð*ðMhð@äë D.

(9) wi| ýt UL?tð_ih |üi U@tit Lu çLýh?L| @?_ îih|h@?_ UL4Ti|ð|ðL?ë N?í _ih çLýh?L| UL4Ti|ð|ðL? @?_ ý?ð|íi*@t|ðUð|) _i4@?_ |üi ThL€| uý?U|ðL? 2 ðt Zð ' •* E• n ò 3ð ä ( êð|ü r ' féf2 @?_ ò ' 2 êi LM|@ð? |üi uL**Lêð?} €}ýhiG. 6ð}ýhi •G ,^ýð*ðMhð@ ý?_ih çLýh?L| UL4Ti|ð|ðL? Er ' féf2c ò ' 2äë. `i U@? tii |ü@| ø2% @?_ ø2+ 4ii| @| |üi t@4i TLð?| @t ø•% @?_ ø•+ c tð?Ui ø•% @?_ ø•+ _itUhðMi |üi t)44i|hðU i^ýð*ðMhð@ë 5ð?Ui ø2% @?_ ø2+ c @?_ @*tL ø•% @?_ ø•+ c _L ?L| 4ii| @?)êüihi i*tic |üihi ðt i @U|*) L?i i^ýð*ðMhðý4c @?_ ð| ðt t)44i|hðU E@| % ä féSfe @?_ + ä féôb2c êð|ü @ñih@}i }hLê|ü h@|i } ä fé2fbäë Aüðt ðt |üi }i?ihðU hitý*| ý?_ih çLýh?L| UL4Ti|ð|ðL? @t êi êð** @h}ýi Mi*Lêë OLêiñihc ý?_ih îih|h@?_ UL4Ti|ð|ðL? EZð ' 4@ ifc • ý ò 3ð jäc @*tL êð|ü r ' féf2 @?_ ò ' 2c êi LM|@ð? 6ð}ýhi 2G S.

(10) 6ð}ýhi 2G ,^ýð*ðMhð@ ý?_ih îih|h@?_ UL4Ti|ð|ðL? Er ' féf2c ò ' 2äë Oihi |üihi ðt @ T@ðh Lu @t)44i|hðU i^ýð*ðMhð@ Eð?ñL*ñð?} |üi t|h@|i}) T@ðht E%• c +• ä ä E•é22bc fé.ôeä @?_ E%2 c +2 ä ä EféSeôc fé•DSäc @?_ }hLê|ü h@|i } ä fé•efä @?_ L?i t)44i|hðU i^ýð*ðMhðý4c êð|ü E%c +ä ä EfébHfc féeffä @?_ }hLê|ü h@|i } ä fé2ôDë `i U@? tii |ü@| |üi i ðt|i?Ui Lu @t)44i|hðU i^ýð*ðMhð@ _iTi?_t L? |üi hi*@|ðñi t*LTit Lu |üi *LUð ø2% @?_ ø2+ @hLý?_ |üi t)44i|hðU i^ýð*ðMhðý4G Aüi i @4T*i ð? 6ð}ýhi ô Er ' fé•Dc ò ' 2ä tüLêt |ü@| @t)44i|hðU i^ýð*ðMhð@ 4@) i ðt| ðu @?_ L?*) ðu |üi t*LTi Lu ø2+ ðt t|iiTih |ü@? |üi t*LTi Lu ø2% Eð? ULLh_ð?@|it E%c +ääG. 6ð}ýhi ôG ,^ýð*ðMhð@ ý?_ih îih|h@?_ UL4Ti|ð|ðL? Er ' fé•Dc ò ' 2äë `i tüLê ð? @TTi?_ð Sëô |ü@| |üi t)44i|hðU i^ýð*ðMhðý4 êð|ü çLýh?L| UL4Ti|ð|ðL? ðt @*ê@)t t|@M*ic êüð*i |üi t)44i|hðU i^ýð*ðMhðý4 ..

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(12) ï? |üi L|üih ü@?_c @ñih@}i }hLê|ü h@|it @hi üð}üih ð? t)44i|hðU i^ýð*ðMhð@ë Aüi hi@tL? ðt |ü@| iñi? |üLý}ü L?i Lu |üi €h4t Uhi_ðM*) i ih|t ñih) üð}ü hiti@hUü igLh|t êüi? €h4t @hi ?iU!í|Lí?iU! @?_ êüi? ð| ðt Miüð?_c tð?Ui |üi L|üih €h4 ð?ñit|t *itt ð? hiti@hUü ð? ML|ü U@titc ð? i^ýð*ðMhðý4 |üihi êð** Mi uiêih ð??Lñ@|ðL?tc êüðUü *Lêiht |üi }hLê|ü h@|ië Aüi _iUhi@ti ð? }hLê|ü h@|itc @t |üi @MLñi i @4T*i tüLêtc U@? Mi tL t|hL?} |ü@| UL?U*ýtðL?t @MLý| |üi hi*@|ðL? Mi|êii? |üi ð?|i?tð|) Lu UL4Ti|ð|ðL? ð? |üi ThL_ýU| 4@h!i| @?_ iUL?L4ðU }hLê|ü U@? Mi hiñihti_ë Aüðt _ðñih}i?Ui Mi|êii? ð?_ýt|h) T@)Lgt @?_ iUL?L4ðU }hLê|üc |L}i|üih êð|ü |üi ð?t|@Mð*ð|) Lu |üi t)44i|hðU i^ýð*ðMhðý4c 4@) 4@!i @t)44i|h) @ êi*u@hi Lh iñi? TL*ðU) ðttýiG Aüi Thiti?Ui Lu @ |LL @}í }hittðñi €h4 Eiñi? ðu |üi UL4Ti|ð|Lht @hi i @?|i L? i^ý@* uLL|ð?}ä 4@) igiU|ðñi*) t*Lê _Lê? }hLê|üc êüð*i !iiTð?} ð?_ýt|h) ThL€|t @| @ üð}üih *iñi*ë AüihiuLhic üð}üih UL4Ti|ð|ðL? ð? |üi ThL_ýU| 4@h!i| êð** L?*) Mi @M*i |L h@ðti }hLê|ü ðu |üi i^ýð*ðMhðý4 ðu €h4t Miü@ñi tð4ð*@h*) ð? i^ýðí *ðMhðý4ë. e. AL *i@TuhL} Lh ?L| |L *i@TuhL}. úOV @ttý4i |ü@| ULt|íhi_ýUð?} ð??Lñ@|ðL?t @hi Lu @ € i_ tð3i òc @?_ |ü@| @ €h4 |ü@| ü@t u@**i? Miüð?_ €ht| ü@t |L U@|Uü ýT êð|ü |üi *i@_ih E4@!i @? ð??Lñ@|ðL? Lu tð3i òä ð?t|i@_ Lu *i@TuhL}}ð?} üð4 E4@!ð?} @? ð??Lñ@|ðL? Lu tð3i ò 2 äë W? |üðt tiU|ðL? êi êð** _ðtUýtt |üi i^ýð*ðMhðý4 Lý|UL4it ðu *i@TuhL}}ð?} ðt TLttðM*ië `i êð** @?@*)3i êüi|üih ð? |üi Thiti?| 4L_i* <?L *i@TuhL}}ð?}< ðt @? LT|ð4@* UüLðUi ðu *i@TuhL}}ð?} |L |üi *i@_ih<t TLtð|ðL? ðt TLttðM*ië W? |üðt U@ti |üi @ttý4T|ðL? Lu <?L *i@TuhL}}ð?}< ð4TLtit ?L hit|hðU|ðL? L? |üi i^ýð*ðMhðý4 t|h@|i}ðitë `i êð** @ttý4i |ü@| <?L *i@TuhL}}ð?}< ðt @? i^ýð*ðMhðý4c êð|ü ñ@*ýi uý?U|ðL?t @t ð? E•ä }ðñi? M) ý ü 7 ' Z• ý E+æ n ûä ` 7 ý T7 c o` ý ü ý ü 7 ý T7 ý %æ T7 ý L 7 c oT7 ' Zf ý S E%ð ä n %ð ` b.

(13) ý ü oL7 ' Z3• ý S E+ð ä n E+æ n ûä T7 ý L7 c @?_ €ht| Lh_ih UL?_ð|ðL?t uLh LT|ð4@* igLh| *iñi*t }ðñi? @t ð? E2ä M) ý ü 7 ý T7 c ` ý ü Sâ E+ð ä ' T7 ý L7 é. Sâ E%ð ä '. ú uL**Lêih êüL ðt _i*ðMih@|ð?} |L *i@TíuhL} u@Uit |üi uL**Lêð?} ñ@*ýi Lu *i@TuhL}}ð?} E@ttý4ð?} |ü@| @u|ihê@h_t |üi i^ýð*ðMhðý4 êð|üLý| *i@TuhL}í }ð?} ðt T*@)i_äG ý ü 7 ý L, c oL, ' Z3• ý S E5ä n E5 n û, ä ` êüihi êi @ttý4i |ü@| ð4ð|@|ðL? ðt 4Lhi _ðæUý*| |ü@? uLh éýt| U@|Uüð?} ýTG f é û, ÷ ûë +iti@hUü igLh| ðt 5 è fc @?_ @| |üi LT|ð4ý4 ðt ý ü 7 ý L, ë Ntð?} Uü@h@U|ihð3i_ M) |üi ýtý@* €ht| Lh_ih UL?_ð|ðL? Sâ E5ä ' ` |üðt €ht| Lh_ih UL?_ð|ðL?t @?_ tL*ñð?}2 uLh L, *i@_t |L E@ttý4ð?} ^ý@_h@|ðU ULt| Lu hiti@hUü @t @MLñiä ü ý Z3• n •2 + 2 n û+ c t ý ü 7 7 ý Z3• n Eû, n oä é ' ` ý Eû, n oä2 n 2 o `. L7 ' L,. • o. Aüi uL**Lêih Thiuiht U@|Uüð?} ýT Lñih *i@TuhL}}ð?} ðu L7 è L, ë úu|ih tL4i 4@?ðTý*@|ðL?t ýtð?} |üi €ht| Lh_ih UL?_ð|ðL?tc @?_ MiU@ýti ð? i^ýð*ðMhðý4 7 ' % n + n L7 c |üðt UL?_ð|ðL? U@? Mi êhð||i? @t ` %2 n 2%+ n 2%û, n 2+û, é 2+ûé Aüðt U@? L?*) üL*_ ðuc ð? i^ýð*ðMhðý4c igLh| *iñi*t @hi ñih) t4@** @?_ û, ðt t4@** i?Lý}üë ú ?iUitt@h) UL?_ð|ðL? uLh Thiuihhð?} U@|Uüð?} ýT Lñih *i@TuhL}}ð?} ðt %2 n 2%+ é 2+ûc êüðUü ðt ð?_iTi?_i?| Lu |üi ñ@*ýi Lu û, ë W| U@? Mi tüLê? |ü@| |üðt UL?_ð|ðL? ðt 4Lhi *ð!i*) |L Mi t@|ðt€i_ ðu ð??Lñ@|ðL? tð3i ò ðt t4@** Lh _ðtULý?| h@|i%i@ti Lu ð4ð|@|ðL? r ðt *@h}i E@?_ |üihiuLhi % @?_ + @hi t4@**äc @?_ @? i @4T*i uLh çLýh?L| UL4Ti|ð|ðL? êüihi U@|Uüð?} ýT ðt Thiuihhi_ |L *i@TuhL}}ð?} ðt |üi i^ýð*ðMhðý4 ý?_ih 5. ç ý Xo è 31 Wkh vhfrqg urrw ri wkh htxdwlrq iru Xo lv h{foxghg e| Z. •f.

(14) |üi T@h@4i|iht ò ' •é•c û ' fé2c @?_ o ' féf•ë ï? |üi L|üih ü@?_c ý?_ih îih|h@?_ UL4Ti|ð|ðL? |üðt UL?_ð|ðL? ?iñih üL*_t uLh @?) ò : •c @?_ |üihiuLhi €h4t Thiuih *i@TuhL}}ð?} iñi? ðu ð4ð|@|ðL? ðt _ðæUý*|c û, ' fc @?_ |üihiuLhi |üi <i^ýð*ðMhðý4< êð|ü U@|Uüð?} ýT ðt ?iñih @? i^ýð*ðMhðý4 ý?_ih îih|h@?_ UL4Ti|ð|ðL? ðu êi @**Lê €h4t |L *i@TuhL}ë AL tý4 ýTc ðu êi hi*@ |üi @ttý4T|ðL? |ü@| €h4t U@??L| *i@Tí uhL}c |üi? ?L *i@TuhL}}ð?} @hðtit @t @? i^ýð*ðMhðý4 Lý|UL4i L?*) êüi? |üi ð?|i?tð|) Lu UL4Ti|ð|ðL? ð? |üi ThL_ýU| 4@h!i| ðt t4@** EçLýh?L| UL4Ti|ð|ðL?äc @?_ ð??Lñ@|ðL? tð3i ðt t4@**c Lh |üi _ðtULý?| h@|i @?_ i@ti Lu ð4ð|@|ðL? @hi *@h}ië. D. çL?U*ýtðL?. 6Lh @ tð4T*i 4L_i* Lu t|iTíM)ít|iT ð??Lñ@|ðL? UL4Ti|ð|ðL? êi ü@ñi tüLê? |ü@| |üi ý?ð^ýi t)44i|hðU i^ýð*ðMhðý4 4@) Mi ý?t|@M*i ðu ThL_ýU| 4@h!i| UL4Ti|ð|ðL? ðt üð}üc ð??Lñ@|ðL?t *@h}ic @?_ _ðtULý?| h@|i @?_ i@ti Lu ð??Lñ@|ðL? t4@**ë W? |üðt U@ti @t)44i|hðU i^ýð*ðMhð@ 4@) i ðt| @t êi**c TLttðM*) @*|ihð?} |üi i4TðhðU@* Thi_ðU|ðL?t @?_ êi*u@hi ThLTih|ðit Lu |üðt 4L_i*ë `i ü@ñi @*tL tüLê? |ü@| |üi @ttý4T|ðL? |ü@| €h4t U@??L| *i@TuhL} i@Uü L|üih _Lit hit|hðU| i^ýð*ðMhðý4 t|h@|i}ðit ð? |üi ti?ti |ü@| €h4t êLý*_ Thiuih |L _ðhiU|*) *i@TuhL} i@Uü L|üih ý?*itt 4@h!i| UL4Ti|ð|ðL? ðt *Lêc ð??Lñ@|ðL?t @hi t4@**c @?_ _ðtULý?| h@|i @?_ i@ti Lu ð??Lñ@|ðL? @hi *@h}ië. S Së•. úTTi?_ð 5)44i|hðU @?_ út)44i|hðU ,^ýð*ðMhð@. W? @ }@4i êð|ü 2 T*@)ihtc t|h@|i}) tT@Uit 7ð Eð ' •c 2ä @?_ }ðñi? Týhi t|h@|i}) Mit| hitTL?ti 4@Tt Kð G 7æ $ 7ð Eæ 9' ðäc |üi Týhi t|h@|i}) i^ýð*ðMhð@ r ' Er• c r2 ä 5 7• û 72 @hi Uü@h@U|ihð3i_ M) |üi € i_ TLð?| ••.

(15) i^ý@|ðL?t rð 5 Kð Eræ ä Eæ 9' ðäë Aüðt *i@_t |L |üi ?iUitt@h) UL?_ð|ðL? L? @? i^ýð*ðMhðý4 t|h@|i}) rð rð 5 Kð EKæ Erð ää. Eæ 9' ðäc. ESä. êüðUü _Lit ?L| _iTi?_ L? |üi t|h@|i}) Lu €h4 æë 6Lh ð_i?|ðU@* Mit| hitTL?ti 4@Tt K• ' K2 ' K L? 7• ' 72 c |üðt UL?_ð|ðL? MiUL4it rð 5 K EK Erð ää ' K2 Erð ä Eð ' •c 2äë ú?) rð êð|ü rð 5 K2 Erð ä ðt T@h| Lu tL4i Týhi ræ äc t|h@|i}) û@tü i^ýð*ðMhðý4 Erð c r÷æ ä tð?Ui |üihi ðt r÷æ 5 K Erð ä êð|ü rð 5 K E÷ 2 Mý| Lu ULýhti ?L| @** UL4Mð?@|ðL?t Lu Er• c r2 ä êð|ü rð 5 K Erð ä Eð ' •c 2ä @hi û@tü i^ýð*ðMhð@ Eý?*itt |üi }@4i ðt 3ihLítý4äë ú*tLc rð êð|ü rð 5 K Erð ä @hi T@h| Lu t)44i|hðU Týhi t|h@|i}) i^ýðí *ðMhð@ Er• c r2 ä êð|ü r• ' r2 ë W| ðt LMñðLýt |ü@| õ ô irð 5 7ð mrð 5 K Erð äj ã rð 5 7ð mrð 5 K2 Erð ä c ðëië t)44i|hðU i^ýð*ðMhð@ @hi |hðñð@* <@t)44i|hðU< i^ýð*ðMhð@ë 5|h@|i}ðit @TTi@hð?} @t T@h| Lu E?L?í|hðñð@*ä @t)44i|hðU Týhi t|h@|i}) i^ýð*ðMhð@ @hi |üihiuLhi }ðñi? M) ô õ * K Erð ä é rð 5 7ð mrð 5 K2 Erð ä a rð 5 Aüiti UL?_ð|ðL?t @hi ð**ýt|h@|i_ ð? |üi UL?|i | Lu |üi uL**Lêð?} t|@|ðU }@4iG Aüihi @hi |êL T*@)iht êð|ü t|h@|i}) ti|t 7• ' 72 ' dfc •oc @?_ T@)Lgt @hi rð Eræ ý •ä2 ý r2ð *2 Eð ' •c 2( ð 9' æäë îit| hitTL?tit @hi uLý?_ |L Mi tð?}*iíñ@*ýi_ êð|ü K Eræ ä ' Eræ ý •ä2 c @?_ |üi Týhi t|h@|i}ðit ð? i^ýð*ðMhðý4 @hi }ðñi? @t |üi tL*ý|ðL?t ELñih dfc •oä Lu |üi uL**Lêð?} i^ý@í |ðL?t t)44i|hðU G E@ät)44i|hðU G. s rð ' Erð ý •ä2 , rð ' ô2 ý •2 Dc q s r ý ü2 2 ô • rð ' Erð ý •ä ý • , rð 5 fc 2 ý 2 Dc • é. Aüi Týhi t|h@|i}) û@tü i^ýð*ðMhð@ @hi |üihiuLhi Efc •äc E•c fäc @?_ E ô2 ý s s • Dc ô2 ý •2 Däë 2 •2.

(16) Së2. Aüi ð?ñihti Mit|íhitTL?ti 4@T. úMLñi êi @h}ýi_ |ü@| |L €?_ |üi ti| Lu @** Týhi i^ýð*ðMhðý4 t|h@|i}ðit êi U@? êLh! êð|ü |üi ð?ñihti hitTL?ti 4@T ð?t|i@_ Lu |üi hitTL?ti 4@T ð|ti*uë AL |üðt i?_ êi ThLñi |üi uL**Lêð?} *i44@G 2. wi44@ • Aüi ti|t Lu € i_ TLð?|t Lu K2 G U2n $ U2n @?_ Lu EK3• ä G U2nn $ U2 @hi ð_i?|ðU@*G r õ ô q ý ü2 E%c +ä m E%c +ä 5 K2 E%c +ä ' E%c +ä m E%c +ä 5 K3• E%c +ä é èhLLuë , |i?_ K3• |L |üi êüL*i Lu U2 M) _i€?ð?} K3• E%c +ä ' > ðu E%c +ä 5 U2 qU2nn c @?_ _i€?i K3• E>ä ' >ë wi| E%c +ä Mi týUü |ü@| E%c +ä 5 K2 E%c +ä( |üi? |üihi ðt E7 %c +7ä 5 U2nn týUü |ü@| E7 %c +7ä 5 K E%c +äc E%c +ä 5 K E7 %c +7äc @?_ |üihiuLhi E%c +ä 5 U2nn ë Aüi? ð| ðt LMñðLýt |ü@| E7 %c +7ä 5 K3• E%c +ä @?_ 2 %c +7äc |üihiuLhi E%c +ä 5 EK3• ä E%c +äë E%c +ä 5 K3• E7 2. %c +7ä 5 6Lh |üi UL?ñihtic *i| E%c +ä 5 EK3• ä E%c +äë Aüi? |üihi ðt E7 3• 2 3• 3• 2 K E%c +ä_Unn týUü |ü@| E%c +ä 5 K E7 %c +7äc L|üihêðti EK ä E%c +ä êLý*_ Mi i4T|)ë AüihiuLhi E%c +ä 5 K E7 %c +7ä @?_ E7 %c +7ä 5 K E%c +äc ðëië E%c +ä 5 2 K E%c +äë. Sëô. 5|@Mð*ð|). W? |üðt @TTi?_ð êi êð** }ðñi @ ThiUðti _i€?ð|ðL? Lu êü@| êi 4i@? M) ât|@í Mð*ð|)â Lu @? i^ýð*ðMhðý4 ð? |üðt }@4i êüihi i@Uü T*@)ih ü@t |êL t|h@|i}ðit ð?t|i@_ Lu L?*) L?ic @?_ _ihðñi @ ?iUitt@h) @?_ týæUði?| UL?_ð|ðL? uLh t|@Mð*ð|) Lu |üi t)44i|hðU i^ýð*ðMhð@ Lu |üðt 4L_i*ë wi| (K @?_ (K3• Mi |üi E2 2ä a@ULMð@?t Lu |üi Mit| hitTL?ti @?_ ð?ñihti Mit| hitTL?ti 4@Ttc hitTiU|ðñi*)ë Aüi? êi t@) |ü@| @? i^ýð*ðMí hðý4 ðt t|@M*i ðu |üi @MtL*ý|i ñ@*ýit Lu |üi Ehi@* T@h|t Lu |üiä ið}i?ñ@*ýit Lu (K @| |üðt i^ýð*ðMhðý4 @hi t|hðU|*) t4@**ih |ü@? •c Lh i^ýðñ@*i?|*)c ðu |üi @MtL*ý|i ñ@*ýit Lu |üi Ehi@* T@h|t Lu |üiä ið}i?ñ@*ýit Lu (K3• @| |üðt i^ýð*ðMhðý4 @hi t|hðU|*) *@h}ih |ü@? •ë Aüðt _i€?ð|ðL? ðt |üi ?@|ýh@* }i?ihí @*ð3@|ðL? |L üð}üihí_ð4i?tðL?@* t|h@|i}ðit Lu |üi ýtý@* ?L|ðL? Lu t|@Mð*ð|) •ô.

(17) uLh |êLíT*@)ih }@4it êð|ü L?ií_ð4i?tðL?@* t|h@|i}ðit @t ië}ë ð? 5i@_i E•bHfäë `i êð** 4@!i ýti Lu |üi ð?ñihti hitTL?ti 4@Tc êð|ü 4 • + 2 n 2ä ý 2å n %2 % ý F E + 2 +2 (K3• E%c +ä ' C Dc 2 rn+ • 2r+ ý 2ä n + ý 2 %2 % 3. @?_ ið}i?ñ@*ýit e• ' e2 '. %2 3r+3+ 2 n %2 3r+3+ 2 3. s. E%e n+ 2 %2 nr2 +2 3eär+neä 2 neå r+3eå än2å + 2 n2%2 ää 2%+. s. E%e n+ 2 %2 nr2 +2 3eär+neä 2 neå r+3eå än2å + 2 n2%2 ää é 2%+. úu|ih týMt|ð|ý|ð?} |üi t)44i|hðU i^ýð*ðMhðý4 tL*ý|ðL? Eeäc |üi *@h}ih ið}i?ñ@*ýi e• ðt @*ê@)t TLtð|ðñi @?_ *@h}ih |ü@? •c êüð*i |üi t4@**ih ið}i?í ñ@*ýi ðt ?i}@|ðñi @?_ 4@) u@** ð? |üi ð?|ihñ@* dý•c foc êüðUü ü@TTi?t ðu @?_ L?*) ðu ä*r2 ' ä* Eo n ûä2 ðt *@h}ih |ü@? |üi TLtð|ðñi hLL| g Eðu ð| i ðt|tä Lu |üi i^ý@|ðL? ý ü •S Eb n •ä2 EDb ý eä2 g e n •b2 ý ôD2bô ý beeb2 ý 2bb2b g ôE.ä ý ü ý DSHb2 n 2HHHb n •efe g 2 ý E•2D2 n .•2bä g ý 2S. ' fc êüihi b ' å*äë `ð|ü îih|h@?_ UL4Ti|ð|ðL?c b ' • MiU@ýti ä ' å ' • ý ò 3• c @?_ |üi TLtð|ðñi tL*ý|ðL? Lu E.ä ðt g ä SDé•.2ë AüihiuLhi |üi t)44i|hðU i^ýð*ðMhðý4 êð|ü îih|h@?_ UL4Ti|ð|ðL? ðt ý?t|@M*i ðu @?_ L?*) ðu E• ý ò 3• ä * Eo n ûä2 : g ä SDé•.2ë î) UL?|ð?ýð|) Lu |üi hi@U|ðL? 4@Ttc @?_ }ðñi? |ü@| ï? |üi L|üih ü@?_c e2 ðt @*ê@)t t4@**ih |ü@? ý• ðu f é b é e*Dc uLh êüðUü E.ä _Lit ?L| ü@ñi @ TLtð|ðñi tL*ý|ðL?ë `ð|ü çLýh?L| UL4Ti|ð|ðL?c ä ' ò3• @?_ å ' •e Eôòn•äEò3•ä c @?_ å ÷ eD ä ðt |hýi uLh @** ò : •ë •nò E•nòä2 AüihiuLhi |üi t)44i|hðU i^ýð*ðMhðý4 êð|ü çLýh?L| UL4Ti|ð|ðL? ðt @*ê@)t t|@M*ië •e.

(18) +iuihi?Uit d•o ú}üðL?c èüð*ðTTic O@hhðtc çühðt|LTüihc @?_ VðU!ihtc aLü? E•bb.äë âçL4Ti|ð|ðL? @?_ }hLê|ü êð|ü t|iTíM)ít|iT ð??Lñ@|ðL?G ú? i @4T*iâë ,ýhLTi@? ,UL?L4ðU +iñðiêc e•G..•õH2ë d2o îi@|üc aLü?c k@|tLý*@ULtc v@??ðtc @?_ N*Tüc #@ñð_ E•bHbäë â5|h@|ií }ðU +:# èL*ðU)âë Aüi ,UL?L4ðU aLýh?@*c bb EçL?uihi?UiäG.eõHôë dôo O@hhðtc çühðt|LTüih @?_ VðU!ihtc aLü? E•bH.äë â+@Uð?} êð|ü N?Uihí |@ð?|)âë +iñðiê Lu ,UL?L4ðU 5|ý_ðitc DeG•õ2•ë deo kL*t|@_c çü@h*it #ë @?_ •@|üðiti?c w@ht E•bH.äë âûiUitt@h) @?_ 5ýuí €Uði?| çL?_ð|ðL?t uLh N?ð^ýi?itt Lu @ çLýh?L| ,^ýð*ðMhðý4âë +iñðiê Lu ,UL?L4ðU 5|ý_ðitc DeGSH•õbfë dDo 5i@_ic aitýt kë E•bHfäë âAüi 5|@Mð*ð|) Lu çLýh?L| hiñðtð|i_âë aLýh?@* Lu ,UL?L4ðU AüiLh)c 2ôG•Dõ2.ë. •D.

(19)

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