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Fn = 2 + 1 (n ⥠1) ã§ {Fn}ãå®çŸ©ãããšã
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ãã§ã«ããŒæ°ã¯å¹³æ¹å åãæããªããšäºæ³ãããŠããããæªã ã«è§£æ±ºãããŠããªãã
m = 20, 24 ã«å¯Ÿã㊠Fm ã¯åææ°ã§ããããšãç¥ãããŠãããããã®çŽ å æ°ã¯1ã€ãç¥ãããŠããªããk ã1ã€æ±ºããæã« k·2 + 1 ã Fm ãå²ãåãçŸè±¡ãç¡æ°ã«èµ·ãããã©ãããç¥ãããŠããªãã
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ã¡ã«ã»ã³ãæ°(ã¡ã«ã»ã³ããããè±: Mersenne number)ãšã¯ã2ã®åªããã 1 å°ããèªç¶æ°ãããªãã¡ 2 â 1(n ã¯èªç¶æ°)ã®åœ¢ã®èªç¶æ°ã®ããšã§ãããããã Mn ã§è¡šãããšãå€ããã¡ã«ã»ã³ãæ°ãå°ããé ã«åæãããš
ãšãªããã¡ã«ã»ã³ãæ°ã¯2鲿³è¡šèšã§ n æ¡ã® 11â¯11ãããªãã¡ã¬ãã¥ããããšãªãã
Mn = 2 â 1 ãçŽ æ°ãªãã° n ããŸãçŽ æ°ã§ããããéã¯æç«ããªã (M11 = 2047 = 23 à 89)ãçŽ æ°ã§ããã¡ã«ã»ã³ãæ°ãã¡ã«ã»ã³ãçŽ æ°(ã¡ã«ã»ã³ãããããè±: Mersenne prime)ãšããããªãããã¡ã«ã»ã³ãæ°ããšããèªã§ãn ãçŽ æ°ã§ãããã®ã®ã¿ãæããããããã«ççŸ©ã®æå³ã§ã¡ã«ã»ã³ãçŽ æ°ãæãå Žåãããã
Mn ãçŽ æ°ãªãã° n ããŸãçŽ æ°ã§ããããšã¯ã次ã®åŒããåãã:
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1644幎ããã©ã³ã»ã¡ã«ã»ã³ãã¯ãçŽ æ° p ã§ 2 â 1 ãçŽ æ°ã«ãªãã®ã¯ãp ⊠257 ã§ã¯ p = 2, 3, 5, 7, 13, 17, 19, 31, 67, 127, 257 ã®11åã®å Žåã ãã§ããããšããäºæ³ãå
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1952幎ãã©ãã¡ãšã«ã»Mã»ããã³ãœã³ã SWAC ãå©çšã㊠M521 ãã M2281 ãŸã§ã5ã€ã®ã¡ã«ã»ã³ãçŽ æ°ãçºèŠããŠä»¥éãçºèŠã«ã¯ã³ã³ãã¥ãŒã¿ã䜿çšãããŠãããã³ã³ãã¥ãŒã¿ã®é²æ©ãšå
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1996幎ãã¡ã«ã»ã³ãçŽ æ°ãçºèŠããããšãç®çãšããŠäœããã忣ã³ã³ãã¥ãŒãã£ã³ã°ã«ãããããžã§ã¯ã GIMPS ãçºè¶³ãã35çªç®ã®ã¡ã«ã»ã³ãçŽ æ° M1,398,269(1996幎11æ13æ¥ãJoel Armengaud)以æ¥ãGIMPSã«ããã¡ã«ã»ã³ãçŽ æ°ã®çºèŠãç¶ããŠããã
2008幎8æ23æ¥ãGIMPS ã¯46çªç®ã®çŽ æ°åè£ããã«ãªãã©ã«ãã¢å€§åŠããµã³ãŒã«ã¹æ ¡ã®æ°åŠéšã®ã³ã³ãã¥ãŒã¿ã«ãã£ãŠçºèŠããããšå ±ããããã®çŽ æ°ã¯é»åããã³ãã£ã¢è²¡å£ãè³éãæžãã1000äžæ¡ä»¥äžã®æåã®çŽ æ°ãšãªããããGIMPS ã«ãã£ãŠåæ ¡æ°åŠéšã«50,000ãã«ãæ
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2008幎9æ6æ¥ãGIMPS ã¯45çªç®ã®çŽ æ°åè£ãããã€ãã§çºèŠããããšå ±ãããããã¯ãGIMPS ã«ãã£ãŠçºèŠãããäžã§ã¯ãçºèŠé åºã𿡿°ãé転ããåããŠã®ã±ãŒã¹ã§ããã
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p ã (4j + 3) åã®çŽ æ°ã®ãšããS0 = 3, Sn = Snâ1 â 2 (n ⥠1) ã§ {Sn} ãå®çŸ©ãããšã
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p ãå¥çŽ æ°ã®ãšããS0 = 4, Sn = Snâ1 â 2 (n ⥠1) ã§{Sn} ãå®çŸ©ãããšã
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ã«ããã Mp ãããã§ãããããã«49, 50, 51çªç®ã®åè£ãšã㊠p = 74207281, 77232917, 82589933 ãæãã£ãŠãããéã«çŽ æ°ããªããã©ããæ€èšŒäžã§ããã
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l ( γ ) = ⫠γ ± g Ό Μ d x Ό d x Μ = ⫠γ ± g Ό Μ d x Ό d t d x Μ d t d t {\displaystyle l(\gamma )=\int _{\gamma }{\sqrt {\pm g_{\mu \nu }dx^{\mu }dx^{\nu }}}=\int _{\gamma }{\sqrt {\pm g_{\mu \nu }{\frac {dx^{\mu }}{dt}}{\frac {dx^{\nu }}{dt}}}}\,dt}
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d 2 x ÎŒ d t 2 + ΠΜ Ï ÎŒ d x Μ d t d x Ï d t = 0 {\displaystyle {\frac {d^{2}x^{\mu }}{dt^{2}}}+\Gamma _{~\nu \rho }^{\mu }{\frac {dx^{\nu }}{dt}}{\frac {dx^{\rho }}{dt}}=0}
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R Ï Ï ÎŒ Μ = â â x ÎŒ Î Ï Îœ Ï â â â x Μ Î Ï ÎŒ Ï + Î Ï ÎŒ λ Πλ Μ Ï â Î Ï Îœ λ Πλ ÎŒ Ï {\displaystyle {R^{\rho }}_{\sigma \mu \nu }={\frac {\partial }{\partial x^{\mu }}}\Gamma ^{\rho }{}_{\nu \sigma }-{\frac {\partial }{\partial x^{\nu }}}\Gamma ^{\rho }{}_{\mu \sigma }+\Gamma ^{\rho }{}_{\mu \lambda }\Gamma ^{\lambda }{}_{\nu \sigma }-\Gamma ^{\rho }{}_{\nu \lambda }\Gamma ^{\lambda }{}_{\mu \sigma }}
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R ÎŒ Μ = R Ï ÎŒ Ï Îœ {\displaystyle R_{\mu \nu }={R^{\rho }}_{\mu \rho \nu }}
R = g Ό Μ R Ό Μ {\displaystyle R_{}^{}=g^{\mu \nu }R_{\mu \nu }}
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G ÎŒ Μ = R ÎŒ Μ â 1 2 R g ÎŒ Μ {\displaystyle G_{\mu \nu }=R_{\mu \nu }-{\frac {1}{2}}Rg_{\mu \nu }}
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G Ό Μ + Πg Ό Μ = κ T Ό Μ {\displaystyle G_{\mu \nu }+\Lambda g_{\mu \nu }=\kappa T_{\mu \nu }}
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https://ja.wikipedia.org/wiki/%E3%83%A2%E3%83%BC%E3%83%84%E3%82%A1%E3%83%AB%E3%83%88%E3%81%AE%E6%A5%BD%E6%9B%B2%E4%B8%80%E8%A6%A7
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https://ja.wikipedia.org/wiki/%E9%9B%B6%E7%A9%BA%E9%96%93
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¬åŒãµã€ãã§ãããSwiki Swikiãã®ããŠã³ããŒãããŒãžãããSqueak eToysã«ãããWebãã©ã°ã€ã³çSqueakã®ããã«ãSwikiã«ç¹åããä»®æ³ã€ã¡ãŒãžãšä»éãã¡ã€ã«ã®ã¢ãŒã«ã€ããåŸãããšãã§ãããæ¥æ¬èªãæ±ãããã«ã¯æäœäžç®æãä¿®æ£ãå ããªããã°ãªããªããããã®ä»®æ³ã€ã¡ãŒãžãçšããããšã§Smalltalkèšèªãç°å¢ã«ç²ŸéããŠããªããšããèµ·ååŸããµãŒãã¹ã¿ãŒããæå³ãããã¿ã³ãæŒãã ãã§æè»œã«éçšãéå§ã§ããã
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ã¯Squeak eToysãåŸè
ã¯Swikiã«å¿
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ã«åé€ãããµãã»ããã«éããªãã®ã§ãSqueak eToysãããã¯Swikiå°çšã§ããã€ãæãå ããããããŸãŸã®ç¶æ
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7,450 |
æ ž (代æ°åŠ)
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ã f ã®æ žãšãªãããã¯ã Ker(f) ã¯å§å M ã® éšå R-å 矀ã§ãããããã§ãæ žãèªæãªããšãšãã®æºååãåå°ã§ããããšãšãåå€ãšãªãããªããäœäžã®å 矀ã§ãããã¯ãã«ç©ºéã®æ žã«ã€ããŠã¯é¶ç©ºéãåç
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æºåå h: S â T ã®äœå Coim(h) 㯠h ã®å Im(h) = h(S) ãšååã§ãããšããåœé¡ãæºååå®çãšãããS, T ã矀ãç°ãç°äžã®å 矀ãªã©ã®ãšãã«ã¯ç¢ºãã«æºååå®çãæãç«ã€ã
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https://ja.wikipedia.org/wiki/%E6%A0%B8_(%E4%BB%A3%E6%95%B0%E5%AD%A6)
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7,453 |
察è§è¡å
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[ 1 0 0 2 ] {\displaystyle {\begin{bmatrix}1&0\\0&2\\\end{bmatrix}}}
[ 1 0 0 0 0 10 0 0 0 0 â 8 0 0 0 0 7 ] {\displaystyle {\begin{bmatrix}1&0&0&0\\0&10&0&0\\0&0&-8&0\\0&0&0&7\end{bmatrix}}}
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ãããããããããã€ãtridiagonal matrix)ãšã¯ã䞻察è§ç·ãšãã®äžäžã«é£æ¥ãã察è§ç·ã«ã ãéé¶ã®æåãæã€è¡åã§ãããçè¡åã®äžçš®ã§ããã
æ°å€è§£æã«ãããŠãã°ãã°äžé察è§è¡åãå«ãæ¹çšåŒãçŸããããã®ãããªæ¹çšåŒã¯ããŒãã¹ã¢ã«ãŽãªãºã ãããã¯äžé察è§è¡åã¢ã«ãŽãªãºã (è±èªç) (TDMA) ãšåŒã°ãããèšç®éã®ãªãŒããŒãO (n) ã®è§£æ³ãçšããŠè§£ãããã
äžããããè¡åãäžé察è§è¡åã«å€æããæ¹æ³(äžé察è§å)ã«ã¯ãããŠã¹ãã«ããŒå€æãã©ã³ãã§ã¹æ³ãç¥ãããŠããã
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https://ja.wikipedia.org/wiki/%E5%AF%BE%E8%A7%92%E8%A1%8C%E5%88%97
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7,455 |
Emacs
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EmacsæäŒ (è±èª: Church of Emacs) ãšã¯EmacsãŠãŒã¶ãŒã«ãã£ãŠäœããããããã£å®æ(è±èªç)ã§ãããEmacsæäŒã¯viããç£ã®æ°åãã§ãã(ããŒãæ°åã§ã¯vi-vi-viã¯666ã衚ããã)ãšããŠããããviã®ãŠãŒã¶ãŒã«å察ããŠããããã§ã¯ãªããããããããã©ã€ãšã¿ãªãœãããŠã§ã¢ãã¢ããããšåŒãã§ãã(ãviã®ããªãŒãœãããŠã§ã¢çã䜿ãããšã¯çœªãšããããèŠè¡ã§ããã)ããã®ãããã£å®æããµããŒãããããã®EmacsæäŒã®ãã¥ãŒã¹ã°ã«ãŒããšããŠalt.religion.emacs,ãååšãããEmacsãŠãŒã¶ãŒã®äžã«ã¯ããããããã®ãç䌌ããããšã詊ã¿ããšããŠãviã®æ¯æè
ã¯å¯ŸæãšããŠviã«ã«ã (è±èª: Cult of vi) ãäœæããã
ã¹ããŒã«ãã³ã¯åè«ã§èªèº«ãEmacsæäŒã®è人 (è±èª: saint) ã§ããSt IGNUciusãšããŠããã
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ãã ããæè¿ã®ã³ã³ãã¥ãŒã¿ã¯ååéããªãã以åèšãããŠããã»ã©Emacsãé
ããšæããããšã¯ãã£ãã«ãªããªã£ããå®éãEmacsã¯æè¿ã®ã¯ãŒãããã»ããµãããçŽ éãç«ã¡äžããã
ããã«ãGNU Emacs 23以éã¯EmacsããµãŒããŒããã°ã©ã ãšããŠç«ã¡äžããŠããããŒã¢ã³ã¢ãŒãã远å ãããããã®å ŽåãEmacsæ¬äœã¯OSèµ·åæã«èªåçã«äžåºŠèµ·åããã ããªã®ã§ãé床ã¯åé¡ã«ãªããªãã
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7,462 |
ISO 3166
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ISO 3166ã¯ãåœéæšæºåæ©æ§ (ISO) ãåœåããã³ããã«æºããåºåãéœéåºçãå·ãšãã£ãå°åã®ããã«å²ãæ¯ã£ãå°çæ
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DoJaãããã¡ã€ã«
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