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Elementary notions of lattice trigonometry

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(3)  "!$#&%')(+*-,&#/.-'"+0 1)2 3 4 5 6 7 4/8"9 :; < = >&? @ ? A B&C&A+> ; D E F)? B G ? A B ; = A >&G H I @ ; ; = J A+; B = K G : G L A ; B = J-H D : J ; = G : >&G H I @ ; ; = J A"@ : K I A > = :"I @ ; ; = J A&K A G LA ; B F M$NA/= : ; B G E D J A&; < AOE A P : = ; = G :"G H > D L > G H I @ ; ; = J A+@ : K I A >/@ : E-A > ; @ Q I = > <)@O: A J A > > @ B F @ : E-> D RJ = A : ;/J G : E = ; = G :"H G B$; < B A AO@ : K I A >/; G+Q A&; < AO@ : K I A >/G H > G LA&I @ ; ; = J AO; B = @ : K I A&= :"; A B L >$G H I @ ; ; = J A ; @ : K A : ; > M+S&< = >-J G : E = ; = G := >-@T A B > = G :G H/; < A)#/D J I = E A @ :J G : E = ; = G : UO; < B A A)@ : K I A >"@ B A"; < A)@ : K I A >+G H > G L A"; B = @ : K I A)= V; < A = B+> D LWA X D @ I >+Y&M+Z D B ; < A B+COA"P : E; < A": A J A > > @ B F@ : E > D RJ = A : ;+J G : E = ; = G :H G B @ :G B E A B A E[ \ ; D ? I A"G H&@ : K I A >-; GQ A"; < A)@ : K I A >+G H/> G L A"J G : T A ] I @ ; ; = J A)? G I F K G :$MO9 :J G : J I D > = G :C&A > < G C@ ? ? I = J @ ; = G : >&; G"; < A G B F)G H J G L? I A ])? B G ^ A J ; = T A+; G B = J+T @ B = A ; = A > _ @ : E@-I = > ;&G H D : > G I T A E"? B G Q I A L> @ : EX D A > ; = G : > M `a+b+cOd/b+c+e. f g h i j/k&l/m h n j g+o p q/o r ots u$vw j$x y z j {"h u&n z)|Ox |Ov ix g&k z j$}v~Ox m $w i j$l/g&kOo p q/o p/o€ j$}vk/n z h n g/m h n j g&z)~Ov h ‚)v v gy x h h n m vx g/k ƒ)l&m y n k$v x g m x z v z o „ q/o „/ot v z m i n |&h n j$gj {-h u$v|&x |Ov i o „ r o v †&g&n h n j$g/z x g&kv y v }v g h x i ‡|&i j |Ov i h n v z)j {"y x h h n m vh i n w j g/j }v h i n m{ l&g/m h n j g&z o ˆ r o r ot‰"i v y n }n g/x i ‡g/j h n j g&z x g&k k$v †Og/n h n j g&z o ˆ r o p/ot v †Og/n h n j gj {"y x h h n m vh i n w j g/j }v h i n m{ l/g&m h n j$g/z o Š r o „/ot‹x z n my x h h n m vh i n w j$g$j$}v h i ‡ j {"y x h h n m vx g$w$y v z n g y x h h n m vh i n x g$w$y v z o Œ p/os u/v j i v }j g z l/}j {-y x h h n m vh x g/w v g h z){ j i)h u$vj i k/n g&x i ‡y x h h n m vx g$w$y v z)j {-y x h h n m vh i n x g$w$y v z o ‰"i j$j {-j {"n h z z v m j g&k z h x h v }v g h o rq p/o r ot-n g&n h vm j g h n g$l$v k { i x m h n j g&z‚n h u g/j hg/v m v z z x i ‡ |Oj z n h n Ž vv y v }v g h z o rr p/o p/ot$j i }l&y x h n j g j {-h u$vh u/v j i v }x g&k|/i j$j {-j {)n h z z v m j g&kz h x h v }v g h o rr „/oƒ"$|Ox g&z n j gj {-j i k&n g/x i ‡y x h h n m vx g$w$y v z o"s u/vg$j h n j$g/zj {"z l/}z{ j iy x h h n m vx g$w$y v z o rp „/o r o‘g x|Ox i h n m l/y x iw v g$v i x y n ’ x h n j g j {"z x n y zn gh u$vz v g/z vj {"“y v n gOo r„ „/o p/otƒ"$|&x g/k/v k y x h h n m vx g$w$y v z o€$l&}z){ j i j i k&n g/x i ‡x g/kv $|Ox g&k$v ky x h h n m vx g/w y v z o r” ˆ&o• v y x h n j g&z~Ov h ‚v v gv $|&x g/k/v ky x h h n m vx g$w$y v zx g&k j i k/n g&x i ‡ y x h h n m vx g/w y v z o‰"i j$j {"j {"h u$v †/i z hz h x h v }v g hj {)s u$v j i v }–p$o p$o pˆ ˆ&o r o‘g i v y x h n j$g/z ~Ov h ‚v v gm j g h n g$l$v k{ i x m h n j g&z { j iy x h h n m vj i n v g h v k~/i j  v gy n g/v z x g&k h u$v y x h h n m vh x g/w v g h z j {-h u$vm j i i v z |Oj$g/k&n g$wv $|&x g/k/v k y x h h n m vx g$w$y v z o pˆ ˆ&o p/ot‰"i j$j {-j {"s u$v j i v }–p$o p x/—"h ‚j|&i v y n }n g/x i ‡y v }}x z o pŠ ˆ&o „/ot‰"i j$j {-j {"s u$v j i v }–p$o p x/—)m j$g/m y l&z n j gj {-h u$v|&i j$j { o p” ˆ&o ˆ&ots u$v j i v }˜j gz l/}˜j {)y x h h n m vh x g$w v g h z { j i j i k/n g&x i ‡ y x h h n m vx g/w y v zj {"m j$g Ž v  |Oj$y ‡$w j$g/z o„ q Š/ot‘g y x h h n m vn i i x h n j g&x y+m x z v o „/r Š/o r of g/†&g&n h vj i k/n g&x i ‡ m j g h n g$l$v k { i x m h n j g&z o „p ™"š › œ U  ž@ B J < Ÿ Ÿ   M ¡œ ¢ £&¤ ¥ ¦ §)š ¨ ¦)© ª ¥ š § œ § « !$@ ; ; = J A > _ J G : ; = : D A E H B @ J ; = G : > _ J G : T A ] < D I I > M ,/@ B ; = @ I I F> D ? ? G B ; A E Q F .-N -\ *-Z/¬&*Ÿ ­ ® M Ÿ ¯ ¯ M  Ÿ Ÿ ­ M Ÿ   W° *-Z/¬&*Ÿ ± \ Ÿ  \ ² ³ Ÿ Ÿ Ÿ \ .-N @ ´K B @ : ; _"Q F *"Z/¬&*µ µ \ ¯ ³ ®  M  Ÿ Ÿ ¶ M ¯)K B @ : ; _ Q F *-Z/¬&*Ÿ ± \ Ÿ ¯ \ Ÿ  ² Ÿ ± \ ·O.-*-µ ! @)K B @ : ; _ @ : E Q F *-Z/¬&*K B @ : ;-Ÿ ± \ Ÿ ¯ \ Ÿ ¯ Ÿ ¯  @ M ¸.

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(5)  . Š/o p/o‘ i k&n g/x i ‡y x h h n m vn i i x h n j$g/x yOx g$w$y v z o Š/o „/ o +x h h n m v  y v g$w h uz v $l/v g/m v z{ j i j i k&n g/x i ‡y x h h n m vn i i x h n j$g/x yOx g/w y v z o Š/o ˆ& o +x h h n m vh x g/w v g h z { j i j i k/n g&x i ‡y x h h n m v• n i i x h n j g&x y+x g/w y v z o Š/o Š/ o +x h h n m vx i m h x g$w v g h { j i j i k&n g/x i ‡y x h h n m v• n i i x h n j g&x y+x g/w y v z o Š/o / o +x h h n m vz n w$g$v k y v g/w h

(6) u  z n g/vn g/†&g&n h vz v $l/v g/m v z o Š/o $ot‰"i j |Ov iy x h h n m v  m j$g$w i l$v g&m vj {y x h h n m vj i n v g h v k n g/†&g&n h v~&i j  v g y n g/v zj$g h u$v l&g/n h k&n z h x g/m v{ i j$}˜h u/vy x h h n m v|Oj$n g h z o Š/o ”/otƒ $l/n Ž x y v g&m vm y x z z v zj { x y }j z h|Oj z n h n Ž vy x h h n m vn g/†&g&n h vj i n v g h v k ~/i j  v g y n g$v zx g/k m j i i v z |Oj g&k/n g/wv $|&x g/k/v k y x h h n m vn g$†Og/n h vx g/w y v z o Š/o Œ/ot•v Ž j y l/h n j$g g$l/}~Ov i { j i v $|Ox g&k$v k y x h h n m  v )x g&k •  n i i x h n j g&x y+x g/w y v z o Š/o r q$ o  j i }x yO{ j i }zj {-v $|Ox g&k$v ky x h h n m v• )x g/ k  n i i x h n j$g/x yOy x h h n m vx g/w y v z o Š/o r r o€/l/}zj {"v $|&x g/k/v k y x h h n m vx g/w y v z x g/k v $|&x g/k/v k y x h h n m vn i i x h n j g&x y+x g/w y v z o  |&|Ov g/k&n   ot‘gw y j ~&x y+i v y x h n j g&zj$gx y w v ~&i x n mz n g/w l&y x i n h n v zj {)m j$}|&y v |/i j  v m h n Ž vh j i n m Ž x i n v h n v z m j i i v z |Oj g&k/n g/wh jn g h v w v i  y x h h n m vh i n x g/w y v z o  |&|Ov g/k&n  ‹ot‘gy x h h n m v  m j g/w i l/v g/m vm i n h v i n j g&z{ j iy x h h n m vh i n x g$w$y v z o ƒ"/x }|Oy v zj {)y x h h n m v h i n x g$w$y v z o  |&|Ov g/k&n  ot€ j$}vl/g&z j y Ž v k $l$v z h n j g j gy x h h n m vh i n w j g/j }v h i ‡ o • v { v i v g/m v z. „p „p „„ „„ „Š „ . „. 

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(9) 61.7&890 -:;+ <&.= >,6 -?&7&8)*)j$g/z n k/v ixh ‚)j  k/n }v g&z n j g&x y&j i n v g h v k i v x y&Ž v m h j iz |&x m vx g/k†/z j$}v{ l&y y  i x g/y x h h n m vn gn h o  h i n x g$w$y vj i x|Oj$y ‡$w j$gn zz x n kh j~Ov*@ A B B C D E n {-x y yOn h zŽ v i h n m v z~Ov y j$g$wh jh u$vy x h h n m v o)s u$vx g$w$y v zj {)x g ‡y x h h n m vh i n x g/w y vx i vz x n kh j~Ov1@ A B B C D E o f gh u/n z|Ox |Ov i‚v n g h i j/k&l/m vx g/k z h l&k$‡F@ A B B C D E B G C H

(10) I JI K1E B G C  D { l/g&m h n j$g/zj { y x h h n m vx g$w$y v z o s u/v y x h h n m vh i n w j g/j }v h i n m{ l/g&m h n j$g/z)x i vn g Ž x i n x g h)l&g/k/v i"h u$vx m h n j gj {Oh u$vw i j$l$|j {-y x h h n m v  x  L g$vh i x g&z  { j i }x h n j$g/zM n o v ox  L g$vh i x g&z { j i }x h n j$g/z|&i v z v i Ž/n g$wh u/vy x h h n m v N ) O y n  vh u$vj i k/n g&x i ‡h i n w j g/j }v h i n m. { l/g&m h n j$g/z)x i vn g Ž x i n x g hl/g&k$v i)h u/vx m h n j$gj {Oh u$vw i j$l$|j {-ƒ)l/m y n k/v x gy v g/w h u|&i v z v i Ž/n g$wh i x g&z { j i }x  h n j$g/zj {)ƒ)l/m y n k/v x g z |&x m v o ‘g$vj {"h u/vn g/n h n x y&w j x y z j {"h u/v|/i v z v g hx i h n m y vn zh j }x  vxm j$}|&y v h vk$v z m i n |&h n j$gj {)y x h h n m vh i n  x g$w y v z)l/|h jh u$vy x h h n m v  x Lg/v v $l&n Ž x y v g/m v i v y x h n j$gM z v vs u/v j i v }p/o p

(11) N o)s u$vm y x z z n †&m x h n j$g|/i j ~&y v } j {-m j$g Ž v y x h h n m v|Oj y ‡$w j g&z)~Ov m j$}v z g/j ‚m y x z z n m x y o"s u/v i vn zz h n y yOg$jxw j$j/kk$v z m i n |&h n j$gj {"m j g Ž v  |Oj y ‡$w j g&z of hn zj g&y ‡/g/j ‚gh u/x hh u$vg$l/}~Ov ij { z l&m u|Oj$y ‡$w j$g/z‚n h uy x h h n m vx i v x~Oj$l/g&k$v k{ i j$} x ~&j Ž v~$1 ‡ Pw i j ‚ h u&z)v $|Oj g/v g h n x y y ‡n 1 g PQO$‚u/n y v Ph v g/k&z)h jn g$†Og/n h ‡M z v vh u$v‚j i /z)j {Ro  i g/j y kTS p U O x g/kj {"f o& ‹ x V i x V g ‡ x g/k  o W o R"v i z u&n T  S„ U N o X vv $|&x g/kh u/v w v j }v h i n mn g h v i |&i v h x h n j$gj {Oj i k/n g&x i ‡m j g h n g$l$v k{ i x m h n j$g/z"h jk/v †&g/vy x h h n m vz l/}z j {y x h h n m vx g$w$y v zx g/kWh j v z h x ~Oy n z u i v y x h n j$g/zj$g y x h h n m vh x g/w v g h zj {y x h h n m vx g/w y v z o &l$i h u$v i O‚)v k/v z m i n ~Ovy x h h n m vh i n x g/w y v z n gh v i }zj { @ A B B C D EZY [

(12) KYj {"y x h h n m vx g/w y v z o f g|&i v z v g h|Ox |Ov i‚)vx y z j z u/j ‚x y x h h n m vŽ v i z n j gj {)h u$vz n g/v{ j i }l&y xx g/kn g h i j/k/l&m vxi v y x h n j$g ~Ov h ‚)v v gh u/vy x h h n m vh x g/w v g h z { j ix g$w$y v zj {)y x h h n m vh i n x g/w y v zx g&k h u/vg$l/}~Ov i zj {)y x h h n m v|Oj$n g h z j g h u$vv k/w v z"j {Oh i n x g$w$y v z M z v vs u$v j i v }˜r o r

(13) ” N o"f gx k/k&n h n j$g O ‚)v}x  v †/i z h)z h v |Oz"n gz h l/k/‡j {+g$j$

(14) g  y x h h n m v x g$w y v z"‚n h uy x h h n m v Ž v i h n m v z Qo Xvm j$g/m y l&k$v h u$v|&x |Ov i)‚n h ux |&|&y n m x h n j$g/z"h jh j i n m Ž x i n v h n v z)x g/kz j }v l&g/z j y Ž v k|/i j ~&y v }z o.

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(17) . s u/vz h l&k$‡ j {)y x h h n m vx g/w y v zn zx gn }|/i v z m i n |&h n ~Oy v|&x i h j {)}j/k$v i gy x h h n m vw v j$}v h i ‡ o f g Ž x i n x g h z j "{ y x h h n m vx g/w y v z x i vl&z v k n g h u/vz h l/k/‡j {"y x h h n m vm j$g Ž v |Oj y ‡$w j g&zx g/k |Oj y ‡$h j |Ov z o€/l/m u|Oj$y ‡$w j$g/z x g/k |Oj y ‡$h j |Ov z |&y x ‡ h u$v|&i n g/m n |Ox yOi j y vn g“y v n g zh u/v j i ‡ j {)}l&y h n k&n }v g/z n j$g/x yOm j g h n g$l$v k{ i x m h n j g&z M z v v O+{ j iv /x }|&y v O+h u/v‚)j i /zj { )o+“y v n g;S r ˆ U ORoOf o  i g/j y kFS r U O+ƒ o+“j i /n g&xTS r  U O&W o+“j g h z v Ž/n m u x g/ k )lOoO€/l/u/j Ž S r Š U Oo +x m u&x l&k S r  U O&x g&kh u$vx l$h u$j i*S r q U N o -x h h n m v|Oj$y ‡$w j$g/zx g/k|Oj y ‡$h j |Ov zj {h u/vy x h h n m vw v j }v h i ‡ x i vn gh u/vy n }v y n w$u hj { m j }|Oy v |/i j   v m h n Ž v h j i n mŽ x i n v h n v z M z v v { j i}j i vn g${ j i }x h n j g h u/v‚j i /zj  { Ro"f o" x g&n y j Ž S ˆ U Oo"ƒ"‚ x y k S Š U O so+‘k/T x S r ” U O+x g/T k Xo+/l&y h j$F g S  U N os+jn y y l&z h i x h v OO‚)vk/v k/l&m  v M n g  |&|Ov g/k&n   N{ i j$}s u$v j i v }p$o p h u$vm j i i v z |Oj g&k/n g/ww$y j ~Ox y+i v y x h n j g&zj g h u$vh j i n mz n g/w l&y x i n h n v z){ j i|/i j  v m h n Ž vh j i n mŽ x i n v h n v z x z z j/m n  x h v kh jn g h v w v i  y x h h n m vh i n x g$w$y v z &o Xvx y z jz u$j ‚ h u$v{ j$y y j ‚n g$wz n }|&y v{ x m h —){ j ix g ‡m j y y v m h n j g‚n h u }l/y h n |Oy n m n h n v z&j {&m j$}|&y v

(18)   h ‚j  k&n }v g/z n j$g/x y h j i n m"x y w v ~&i x n m)z n g$w$l/y x i n h n v zOh u/v i v"v /n z h z+xm j }|Oy v

(19)   h ‚)j  k&n }v g&z n j g&x y-h j i n m|&i j  v m h n Ž vŽ x i n v h ‡ ‚n h u h u/vw n Ž v g m j y y v m h n j g j { h j i n mz n g$w$l/y x i n h n v 1 z M h u&n zi v z l&y h z v v }zh j~Ovm y x z z n m x y O/~&l/h n h n z }n z z n g/wn gh u$vy n h v i x h l/i v N o s u/vz h l&k/n v z)j {-y x h h n m vx g$w$y v zx g&k}v x z l/i v z)i v y x h v kh jh u/v }‚v i vz h x i h v k~$‡  o o$“u$j Ž x g&z /n n O  oO‰)l$/u&y n  j Žn ; g S r p U"x g&; k S r „ U-n g r Œ Œ p/os u$v ‡n g h i j/k/l&m v kx g&kn g Ž v z h n w x h v kz |Ov m n x y+x k/k&n h n Ž v|Oj y

(20) ‡  g/j }n x y-}v x z l$i v{ j ih u$vv $|Ox g&k$v kg/j h n j gj {)|Oj$y ‡$h j |Ov z os u$vi v y x h n j$g/z~Ov h ‚)v v g z l&* }  { j i }l/y x z j { y x h h n m vh i n w j g/j }v h i n m{ l&g/m h n j g&z)x g&ky x h h n m vx g/w y v zn g“u/j Ž x g/z /n n  ‰)l//u/y n  j Žz v g&z vx i vl&g$/g/j ‚gh j h u$vx l/h u/j i o q/o p$o -:;+8&4 0 3 4 7&= 3 4 -7&0<Q+ 3 1+

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(203) + b  $d&e ( f gh u&n z)z v m h n j$g‚)vn g h i j/k/l&m v h u/vg/j h n j gj {Ov $|Ox g&k$v ky x h h n m vx g$w$y v z)x g/kh u$v n ig/j i }x y/{ j i }z)x g/k w$n Ž vh u/vk/v †&g&n h n j$gj {"z l/}zj {-v $|Ox g&k$v ky x h h n m vx g$w$y v z o)$i j$}˜h u$vk/v †&g&n h n j$gj {"z l/}zj {"v $|&x g/k/v k y x h h n m vx g/w y v z‚)v j ~/h x n gWx k$v †Og/n h n j g j {z l&}zj {j i k/n g&x i ‡ y x h h n m vx g$w$y v z o $j ih u/vk$v †Og/n h n j g j { v $|&x g/k/v ky x h h n m vx g/w y v z)‚vv $|Ox g&kh u/vg/j h n j gj {-z x n y z)n gh u$vz v g&z vj {-“y v n g+—+‚vk$v †Og$vx g/k z h l&k$‡ j i n v g h v k~&i j  v g y n g/v z)j$gh u$vl/g&n hk&n z h x g/m v{ i j$}–y x h h n m v|Oj n g h z o U p  „  'r  p  „  'r  p  „ S .

(204) ¸ s u/i j l/w u/j l/h+h u/n z-z v m h n j$g‚)v‚)j i n gh u$vj i n v g h v kh ‚j  k&n }v g/z n j$g/x y i v x y Ž v m h j i)z |&x m v)‚n h ux †/$v k y x h h n m v oX vx w$x n g†&z j }vy x h h n m v M |Oj z n h n Ž v y ‡ j i n v g h v kN)~Ox z n zx g/kl/z vh u$vz ‡/z h v }–j {)m j$j i k/n g&x h v z m j i i v z |Oj g&k/n g/wh jh u/n z~&x z n z o s u/vy x h h n m v  x Lg$vh i x g&z { j i }x h n j$g n zz x n kh j~O( v G I 

(205) E Gn {n hn zj i n v g h x h n j$

(206) g  |&i v z v i Ž/n g$w&* o X vz x ‡ h u/x hh ‚j z v h z x i v G I 

(207) E G @ A B B C D E

(208) D I J H G [E JBh j v x m u j h u$v in {h u$v i vv /n z h x |/i j |Ov i y x h h n m v  x Lg$v h i x g/z { j i }x h n j gj {  h x /n g$wh u$v†&i z h z v h h jh u/vz v m j g&kOo „/o r o7F. 5&.6 3 4 = ?&/ .6,+

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(212) 7&0 +T-2  / +

(213) 4 7)f gh u&n zz l/~&z v m h n j g‚)v n g h i j/k&l/m vh u/vk$v †Og/n h n j gj { x g j i n v g h v k~&i j  v g y n g/v zj g h u/vl&g/n hy x h h n m vk/n z h x g&m v{ i j }xy x h h n m v |Oj n g h os u/n zg/j h n j g n zxk&n i v m hw v g/v i x y n ’ x h n j$g j { h u/vg/j h n j g j {zz x n y)n g h u$v z v g&z vj {“y v n g M z v v |Ox w  v { j i)h u$vk$v †Og/n h n j gj {-xz x n y N &o Xvv $|Ox g&kh u/vk/v †&g&n h n j$gj {-y x h h n m vy v g/w h

(214) u  z n g/vz v $l$v g&m v z)x g/k m j g h n g$l$v k{ i x m h n j$g/z)h jh u/vm x z vj {+h u$v z v~&i j  v gy n g/v z o X vz u/j ‚ h u&x hv $|Ox g&k$v ky x h h n m vy v g$w h u  z n g$v z v $l$v g&m v{ j ij i n v g h v k~/i j  v gy n g/v z l/g&n $l$v y ‡ n k/v g h n †&v zh u/v|&i j |Ov iy x h h n m v  m j$g$w i l$v g&m vm y x z z j {)h u/v m j i i v z |Oj$g/k&n g$w ~/i j  v gy n g$v o-&l$i h u$v i O ‚)v z h l&k$‡h u$v)w v j }v h i n m x y/n g h v i |/i v h x h n j gj {/h u$v m j i i v z |Oj$g/k&n g$w m j g h n g$l$v k { i x m h n j g+o „/o r o r  o

(215) *E QJC B C I J;I *A@ A B B C D E*Y C H JE  @ E J

(216) H B 

(217) Y C JEY E 1 [E JD E ) /j ih u/vk/v †&g&n h n j$gj {"v $|&x g/k/v ky x h h n m v x g$w y v z-‚vv $|Ox g&kh u$vk$v †Og/n h n j gj {Oy x h h n m v y v g/w h

(218) u  z n g/vz v $l/v g/m v h jh u/v m x z vj {Om v i h x n g~&i j  v gy n g/v z o /j ih u/v„  h l/|&y v zj {"y x h h n m v|Oj n g h z O O&x g&k ‚vk/v †&g/vh u$v{ l/g&m h n j$g z w gx z { j y y j ‚z —  r  n {-h u/vm j$l$|Oy vj {-Ž v m h j i z x g&k k$v †Og$v zh u$v|Oj$z n h n Ž v j i n v g h x h n j$gOo. k x i vm j$g h x n g$v kn gh u$vz x }vz h i x n w$u hy n g$v o z w$g M N$  q  n {-h u/v|Oj$n g h z O O/x g/  'r  n {-h u/vm j$l$|Oy vj {-Ž v m h j i z x g&k k$v †Og$v zh u$vg/v w x h n Ž v j i n v g h x h n j$gOo X vx y z jk$v g/j h v~$‡ z n w$g —  'r  q  r h u/vz n w$g{ l/g&m h n j$gj Ž v ii v x y z o s u/vz v w }v g  h –n z z x n k h j~Ov I J B E*[JC B  C Y B A JD E { i j$}˜h u$v|Oj$n g  h n {-h u$vy x h h n m vŽ v m h j i zj { h u$vz v w }v g  h O/x g/k h u/vŽ v m h j i w v g$v i x h vh u$vy x h h n m v o  l/g&n j gj * { M j i k$v i v k Ny x h h n m vz v w$}v g h  z   ¸   ¸         ¸  9M P 

(219) q Nn zz x n kh j~OvT x @A B

(220) B C D ETI G C E JB E $ G I  E J @ C JEx g&kWk/v g$j h v kW~$‡   ¸      Wn {x g ‡Wh ‚)jWm j g&z v m l$h n Ž vz v w$}v g h zx i v g/j hm j g h x n g/v k n g h u$v z x }v z h i x n w$u hy n g/v o XvWx y z j z x ‡ h u&x hh u/v y x h h n m v j i n v g h v k ~&i j  v g y n g$v    ¸       n z C J E G Y Eh jh u/vy x h h n m vj i n v g h v k ~/i j  v gy n g$v   ¸  &    Oo % + Q7&4 3 4 -7 #     )j g&z n k$v ixy x h h n m vj i n v g h v k~&i j  v gy n g/vx g/kxy x h h n m v|Oj n g hn g h u/vm j$}|&y v }v g h h jh u/n z y n g/v o"s u/v~/i j  v gy n g$vn z z x n k h j~O v I J B E[JC B  C Y B A JD E { i j$}˜h u/v|Oj$n g h n {"x y yOv k/w v z j {"h u/v ~&i j  v gy n g$vx i vj$g h u/vl/g&n h y x h h n m vk/n z h x g&m v{ i j }˜h u$v|Oj$n g h o +v h l/zg/j ‚ x z z j/m n x h vh jx g ‡y x h h n m vj i n v g h v k~&i j  v gy n g/v j$gh u/vl&g/n hk&n z h x g/m v{ i j }˜z j$}v|Oj$n g h h u$v{ j y y j ‚n g/wz v $l$v g&m vj {"g$j$

(221) g  ’ v i jv y v }v g h z o % + Q7&4 3 4 -7 #    +v  h   ¸      ~Ov xy x h h n m v j i n v g h v k ~/i j  v gWy n g/vj$g h u/vl/g&n hk/n z h x g&m v{ i j$} z j }vy x h h n m v|Oj$n g 0h Co"s u/vz v $l$v g&m  v M         Nk$v †Og$v k x z{ j$y y j ‚z —   z w$ g M  C ¸ N$y  M   ¸ N   ¸  z w$ g M  C ¸ N$z w$g M  ¸ C N$z w$g M   ¸  N$y z n g   ¸     z w$ g M  ¸ C N$y  M  ¸  N  

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