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ãã®å ŽåãN =-=1i2-i2 = 625-4 =621ãäžæ¹ãå¢çäºä¹ãååšããå Žåãæ°å€N =1i2-i2 =ïŒ25 + 2ïŒã®å æ°å解ã¯ç°¡åã«å®è¡ã§ããŸãïŒ25-2ïŒ = 27â¢23ã
äŸã§æ€èšããå æ°å解åé¡ã解決ããããã®ã¹ããŒã ã¯ãå¢çã®ä»ã®ä»£æ¿ãã¢ã®æ€åºãä¿èšŒããŸãã k 2/2ãšäžèŽããå·®C 2 k + 1 -k p / 2ãæ€çŽ¢ãããšãk = 19ã倧ãããªããšãã®ãããªäžèŽãçããŸããçåŒC 2 k + 1 -k p / 2 = 190-77.5 = 112 ã5ã€ã®ãã¡å°ããæ¹ãèŠã€ããŸãã k =â2Ã112.5 =â225= 15.ããã§ãåºéãšå æ°å解Nã®å¢çã®æ€çŽ¢ãéå§ã§ããŸãã
ééã®å¢çã¯æ¬¡ã®ãšããã§ãã
â¢k = 15ã§ã®å·Šå¢çãGl =ïŒ2kïŒ 2 =ïŒ2â¢15ïŒ 2 = 900ã
â¢k = 19ã®æ£ããå€ã¯=ïŒ2k + 1ïŒ 2 =ïŒ2â¢19 + 1ïŒ 2 = 392 = 1521
â¢N =-=1i2-i2 = 1521-900 = 621ããã³
â¢N =1i2-i2 =ïŒ39 + 30ïŒïŒ39-30ïŒ= 69â¢9ã
äŸ4 ïŒ å·Šã®æ°å€ã®é€ç®ã§ãåèšã®æ°å€ã®ååïŒæŽæ°ã§ã¯ãªãïŒã¯ããã倧ããªèŒªéããåãããŸãïŒã
æ°N = 235ãäžããæ°N = 235â¡3ïŒmod4ïŒãæ®ããŸãã
éç茪éã®é·ãLn = 235 + 237 = 472ããã®æ°k p = L / 8 = 472/8 = 59ãk p / 2 = 29.5ãéç茪éã®å¢çã®å€ïŒå³=ïŒ2k p ïŒ 2 = 118 2 ãå·Šã®GL =ïŒ2k n â1ïŒ 2 = 117 2ãããã¯ãæ°N = 235â1ã®èªæãªå±éã«å¯Ÿå¿ããŸãã
ãã³ããªã³ã°ã¢ãã«ãããk p / 2 = 29.5ã§ãã N = 235ã®å ŽåïŒåè¿°ã®äŸãåç
§ïŒk p ïŒ235ïŒ/ 2 = 29.5
åk 2/2 = 40.5ã®æãè¿ãå€ã¯ãè¡k = 9ã«ãããŸãã
ããã¯ãå·®k 2/2-k p / 2 = 40.5-29.5 = 11ã«å¯Ÿå¿ããŸããããã¯ãåãsumãã«ã¯ãããŸããã
次ã®ã¬ãã«ã¯k = 11ããã³k 2/2 = 60.5ã§ã;ããã¯ãå·®k 2/2-k p / 2 = 60.5-29.5 = 31ã«å¯Ÿå¿ãããåèšãåã«ããããŸããã 次ã®ã¬ãã«ã¯k = 13ããã³k 2/2 = 84.5ã§ãããã¯å·®ã«å¯Ÿå¿ããŸã
k 2/2-k p / 2 = 84.5-29.5 =55ãããã¯ãæ°k = 10ã®è¡ã®ãsumãåã«ãããŸãã
ãã®ããšããã10çªä»¥äžããå§ãŸããã¹ãŠã®è¡ãk p / 2ã®åèšã«å«ãŸããªããšããçµè«ã«ãªããŸãã ãããã£ãŠãk p / 2 = 29.5 = 11+ 12 + 13/2ã
äžããããæ°ãå æ°å解ããŸãã çªå·ã®çªå·ä»ãã¢ãã«ã圢æããçé«ç·çªå·ãèŠã€ãããŸãïŒk = 11ã12ãããã³13ãk= 13ããããã®çé«ç·ã®å·Šååã®ã¿ãåŒã«å
¥ããŸãã
茪éã®é·ãLïŒ11ïŒ= 8â¢11 = 88ãèšç®ããŸãã LïŒ12ïŒ= 8â¢12 = 96; LïŒ13ïŒ= 8â¢13 = 104; 13çªç®ã®çé«ç·ã®å·Šååã¯mïŒ13ïŒ= 104/2 â1 = 51ã§ããééã¢ãã«ã¯88 + 96 + 51 = 43 + 45 + 47 + 49 + 51 = 235ã§ãã
åºéã¢ãã«ã®å¢çãå®çŸ©ããŸãã
â¢ïŒ13ïŒ=ïŒ2â¢13ïŒ 2 = 26 2 = 676;
â¢ChïŒ11ïŒ=ïŒ2â¢11â1ïŒ 2 = 21 2 = 441ã
æ°N = 235ãå æ°å解ã§ããããã«ãªããŸãã
NïŒx1ãxoïŒ= 235 =ïŒx1 + xoïŒïŒx1-xoïŒ=ïŒ26 + 21ïŒïŒ26â21ïŒ= 47â¢5 = 235ã
äŸ5 ïŒ æ£ããæ°å€ã®é€ç®ãããã§ãæ°å€ã®ååïŒæŽæ°ã§ã¯ãªãïŒã¯å°ãã茪éããåãããŸãïŒã
N = 357ãšããŸããããã¯æ£ããæ°ã§ãN = 357â¡1ïŒmod4ïŒãéç茪éã®é·ãã¯Ln = 357 + 355 = 712ããã®æ°ã¯k p = L / 8 = 712/8 = 89ãk p / 2 = 44.5ãå¢çå¶éåè·¯ïŒ
â¢å·ŠGL =ïŒ2k p â1ïŒ 2 = 177 2 ã
â¢å¹³åHz =ïŒ2k n ïŒ 2 = 178 2 ã
â¢å³åŽã®Î=ïŒ2k n + 1ïŒ 2 = 179 2ãããã¯ãæ°N = 357â1ã®èªæãªå±éã«å¯Ÿå¿ããŸãã
aïŒx1 = 19; ho = 2; N =ïŒ2â58ïŒ-ïŒ58â2-1ïŒ=1i2-i2 = 19 2-2 2 = 361-4 =ïŒ19 + 2ïŒâïŒ19-2ïŒ= 21â17 = 357ãk n / 2 =Âœ+ 2 + 3 + 4 +5 + 6 + 7 + 8 + 9 = 44.5
bïŒx1 = 61; ho = 58; N =ïŒ2â58ïŒ-ïŒ58â2-1ïŒ=1i2-i2 = 61 2-58 2 = 3721-3364 =ïŒ61 + 58ïŒâïŒ61-58ïŒ= 119â3 = 357; k p / 2 = 29/2 + 30 = 44.5
ä»»æã®èŒªéã®é·ããšå¥æ°ã®æ£æ¹åœ¢éã®èªç¶æ°åã®ééã¯8ã®åæ°ã§ããmod8ã®å¥æ°ã®æ£æ¹åœ¢ã®å°äœã¯1ã§ãã5以äžã®å¥æ°ã®çŽ æ°ã®æ£æ¹åœ¢ã®å€ã®å·®ã¯åžžã«24ã®åæ°ã§ãïŒ7 2-5 2 = 24ïŒã ããã¯æ¬¡ã®ããã«è¡šç€ºã§ããŸãã 2ã€ã®å¥æ°ã®çŽ æ°ã®äºä¹ãèããŠããããã®å·®ãèŠã€ããŸãã 3ã€ã®é£æ¥ããæ°å2n-1ã2nã2n + 1ã®ãã¡ã1ã€ã¯åžžã«3ã®åæ°ã§ãã ç§ãã¡ã®å Žåã極å€ã¯ä»®èª¬ã«ããçŽ æ°ã§ãããããããã¯æ°n = 3tã§ãã
â¢LF1 2 =ïŒ2n-1ïŒ 2 = 4n 2-4n + 1 = 1 + 4nïŒn-1ïŒ= 1 + 8 C p 2 ã
â¢22 =ïŒ2n + 1ïŒ 2 = 4n 2 + 4n + 1 = 1 + 4nïŒn + 1ïŒ= 1 + 82 n + 1 ã
â¢LF2 2 -LF1 2 = 8ïŒC 2 n + 1 -C n 2 ïŒ= 4nïŒn + 1-n + 1ïŒ= 8n = 8ã»3t = 24tã
æ°Nã3ã®åæ°ã§ããå Žåãåºéã¢ãã«ã§ã¯ã3ã€ã®ååè·¯ã䞊ãã§åœ¢æãããŸãã èšãæããã°ãæ°å€ãæ£ããå Žåãååã¯å°ãã茪éããã®ãã®ã§ãã N = 357 = 119â¢3ã®å Žåãk n / 2 = 44.5ã ååæ°ã®å€ã¯ãåŒïŒk p / 2 â1ïŒ/ 3 =ïŒ44/5-1ïŒ/ 3 = 14.5ã«ãã£ãŠæ±ºå®ãããŸãã ãããã£ãŠãå°ãã茪éã®æ°ã¯14.5â¢2 = 29ã§ã次ã®èŒªéã®æ°ã¯30ã§ããå®éã29/2 +30 = 44.5 = k p / 2ã§ãã æ°Nã5ã®åæ°ïŒ5ã€ã®ããŒãã«ãŒãã§åœ¢æïŒã®å Žåãæ°ïŒk p / 2-6ïŒ/ 5ã
å®æœäŸ6 ïŒ ééã®ç¹æ§ãš3ã®åæ°ã®ãã³ããªã³ã°ã¢ãã«ã®é¢ä¿ ïŒ
å·Šã®æ°å€NïŒx1ãxoïŒ= 183ããã³å³ã®æ°å€NïŒx1ãxoïŒ= 189ã«ã€ããŠãå æ°å解ããæ°å€ã®éç茪éã®æ°ãšé·ãã決å®ããŸãk p ïŒNlïŒ= k p ïŒ183ïŒ=ïŒ183 + 185ïŒ/ 8 = 46ãããã³k p ïŒNpïŒ= k p ïŒ189ïŒ=ïŒ187 + 189ïŒ/ 8 =47ã次ã«ãçªå·ä»ãã¢ãã«k p ïŒ183ïŒ/ 2 =ïŒk + 1ïŒã®å¶éããŒãã«ãŒãã®æ°ã®æ¹çšåŒãäœæããŸãã / 2 + kãããããk p = 3k + 1ããã³k =ïŒk p -1ïŒ/ 3 = 45/3 = 15ã
â¢N = 183å³å¶æ°Hzã®ééã®å€§ããªå¢çïŒ16ïŒ=ïŒ2ã»16ïŒ 2 = 32 2 = 1024
â¢å°ããå·Šå¢çã¯GlïŒ15ïŒ=ïŒ2â¢15-1ïŒ 2 = 29 2 = 841ã§ãã
æ°å€ã®å æ°å解N = 183 = 32 2-29 2 =ïŒ32 + 29ïŒïŒ32-29ïŒ= 61â¢3ã
NïŒx1ãxïŒ= 3tã®åœ¢åŒã®æ£ããæ°ãšåºéã¢ãã«ã®çé«ç·ã®æ°ã®åèšãšã®é¢ä¿ã¯æ¬¡ã®ãšããã§ãã
åè·¯çªå·ã®ååã«ééã®æ¬¡ã®åè·¯ã®çªå·ãå ãããã®ã¯ã調æ»å¯Ÿè±¡ã®æ°ã®å¶éåè·¯ã®æ°k p ïŒNpïŒ/ 2ã«çãããªããŸãã
æ£ããæ°NïŒx1ãx®ïŒ= 189ã®å Žåãå¶éåå°äœã®å€k p ïŒ189ïŒ/ 2 =ïŒk â 1ïŒ/ 2 + kã
whence k p = 47 = 3k-1 and k =ïŒk p + 1ïŒ/ 3 = 48/3 =16ãN= 189ã®ééã®å°ããå¢çã¯15 Hzåè·¯ã«ãããŸãïŒ15ïŒ=ïŒ2â¢15ïŒ 2 = 30 2 = 900ããã³ïŒ16ïŒ=ïŒ2â¢16 + 1ïŒ 2 = 33 2 = 1089ã
æ°å€ã®å æ°å解N = 189 =ïŒ33 + 30ïŒïŒ33-30ïŒ= 63â¢3
åæ§ã®èšç®ã¯ã5ã7ã9ãªã©ã®å·Šå³ã®åæ°ã«å¯ŸããŠãå®è¡ã§ããŸãã
䜿çšããããœãŒã¹ã®ãªã¹ã
[1] Hall M. Combinatoricsã -MãïŒããŒã«ã1970 .-- 424 pã
[2] Andrews G.ããŒãã£ã·ã§ã³çè«ã -MãïŒScience GRFMLã1982幎ã -256ç§