g(a)=∑ (k integer) d = 2T Skk,(orthogonality We recall that Skk, is the Kronocker symbol and is equal to 1 if k= kpand a otherwiser being the above relations hipl the coei cients gk can be computed rectly g(a 一ik逻 c ote that when g(a)is reall gk=gH l where u denotes complet corrugater He ha fe a tari 6(c)] dc <no aldp note that the de p"potion precented aboe van me written in an valent for“ 0)=1中 with k=9k I g-k and uk.=e(gk-9-k)➔➈→✠➣✹↔❯↕ ➛➙ ➜✼➝✫➞ ➙ ➔➜❷➟✗➠ ➜✼➡ →✍➢❚➤✕➥❥➦✺➧✔➨●➧★➩✑↔➭➫ ➯✹➲✡➳✓➵✼➸✟➺✄➺❍➸✟➻❨➼✄➽❥➾✣➸✟➚✘➪✠➲✡➸✺➾✯➸☞➽✽➶✟➺✮➼✄➪✍➹❧➚❊➳✔➺✕➶✟➪✛➼✏➸✟➽✆➘❆➲❉➼➴P➘✼➶☞➪✍➼✵➘✠➷❝➳✺➬❧➮✔➹✶➪✄➲✆➳✞➱✃➸☞❐❉➚✘➼✏➳✼➚✧❒✞➸✐➬●➳✼➘❚❮✺➶☞➽❩➮✑➳ ➳✑➶✗➘✘➼✄➺✱➹✧❰✟➳✔➚✘➼➷✚➳✑➬ Ï❁Ð✺Ñ Ò ➟ ➠ ➜✘➡ ➟ ➞ ➠ ➜✼Ó❍➡☛Ô➣✬↕ÖÕ☞×❧Ø➜✼➜ Ó →✏Ù●➩❊➦❊Ú✡Ù✯➨●Ù✯➥✆Û☞Ü❍➤✮➦✥Ý✡↔ Þ❑➳✲➚❊➳✑❮✑➶✟➺✄➺▲➪✠➲✡➶☞➪ Ø➜✼➜ Ó ➼✵➘✬➪✠➲✡➳❚ß❷➚❊➸✟➽✹➸★❮✑à●➳✔➚✬➘✘➹✟❒☛➮✑➸✟➺á➶☞➽✽➬â➼✵➘✶➳✑ã✼❐✆➶☞➺❪➪ä➸❧åæ➼➵ ➢P↕ç➢❉è ➶☞➽✽➬ é ➸✟➪✠➲✡➳✔➚✘➻❨➼✵➘✔➳★êÖë✃➘✘➼✄➽ì➾❑➪✠➲✡➳➃➶✯➮✑➸✟❰✟➳➃➚✺➳✼➺✕➶☞➪✍➼✏➸☞➽✡➘❊➲ì➼➴✽í➒➪✠➲✡➳❚❮✺➸✐➳✍î✴❮✔➼✏➳✼➽⑤➪✏➘ ➔➜ ❮✑➶✟➽✴➮✺➳❚❮✑➸✟❒á➴✽❐❉➪❘➳✺➬ ➬✟➼✄➚✺➳✺❮✔➪✛➺✱➹➃➶✗➘ ➔➜ ↕ å Õ✟× Ï✣Ð❊Ñ Ò ➔➈→✠➣✹↔ ➟ ➞ ➠ ➜✘➡ Ô➣ ï✻➸☞➪ä➳❖➪✄➲✆➶✟➪❝➻ð➲✡➳✔➽ ➔➈→✠➣✹↔ ➼✵➘ñ➚❊➳✑➶✟➺✱í ➔➜ ↕❩➔✡ò➞✹➜ í❯➻ð➲✆➳✼➚✺➳ ò ➬●➳✔➽✽➸☞➪ä➳✼➘✻❮✺➸☞❒▲➴✹➺✕➳✺ó❑❮✺➸☞➽✔ô✘❐●➾❥➶✟➪❘➳★ê õ❧ö➈÷✘ø❑ù ú❨ö➋û✆ü✗ý❘ø☞ü✧þ●ø☞ü✗ý❘ø☞þ ÿÙ✁￾✡➩✺➤✕➧★➩✄✂❊➧✔➩✺➤✕➧☎✂ðÛ●➩❊➧❯Ù✯➥✡Ü❍Ý✝✆✡➧✟✞✆➥✡➧☎✆✡✠✠Ù✯➩☛✠☞￾✡➥✍✌✘➦❊➤❍Ù●➥✍✂☛✎❪Ú✡➤✏✌✑Ú✑✂✺Û✟➦✺➤✒✂✓✠✠Ý✓➦❊Ú✡➧✔✠✠Ù●Ü❍Ü❍Ù✕✎❪➤✕➥✡➨á➩❊➧★➨✖￾✡Ü✵Û☞➩✺➤✮➦✥Ý ✌✼Ù✯➥✗✆❉➤✕➦❊➤❍Ù●➥ Ï❁Ð✺Ñ Ò ✘ ➔➈→✠➣✹↔ ✘ Ð Ô➣✚✙✜✛✜✢ ✣➧ Û☞Ü✏✂❊Ù✣➥✡Ù●➦❊➧✶➦✺Ú✆Û✟➦❚➦❊Ú✡➧✤✆❉➧☎✌✼Ù✖✥✧✦✽Ù✁✂❊➤✮➦✺➤✕Ù✯➥✜✦✡➩✺➧★✂❊➧✔➥❥➦❊➧☎✆ÖÛ✪✩✽Ù✕✫●➧✬✌✔Û☞➥✭✩⑤➧✬✎❪➩❊➤✕➦❆➦✺➧✔➥①➤❍➥①Û●➥ ➧★✮✯￾✡➤✒✫✟Û☞Ü❍➧✔➥❥➦✰✠✠Ù●➩✱✥ Û✖✂ ➔➈→✠➣✹↔❯↕ ➛➙ ➜✼➝Ò ✍✲➜ ✌✼Ù✯✂✆➢ì➣✴✳✶✵➜ ✂❊➤✕➥á➢ì➣✄✷ ✎❪➤✕➦❊Ú ✲ ➜ ↕❩➔➜ ✳â➔ ➞➈➜ Û●➥✗✆✸✵➜ ↕✜✹✘→✄➔➜✻✺ ➔ ➞✹➜ ↔✘➫ ✼