Hal Milyan ee Lambar ee Ugu Horreeya Pi
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Pi, oo ah saamiga u dhexeeya wareegga goobo iyo dhexroorkeeda, waxaa la ogaa kumannaan sano. Xitaa ka hor xilliga taariikhda guud, xisaabyahannadii hore waxay heleen qiyaaso pi ah oo sax ahaa ilaa laba lambar, 3.1. Baabiliyiintu waxay 25/8 u adeegsadeen qiyaas ahaan pi. Masaaridii hore waxay pi u adeegsadeen 16/9 oo la laba jibbaaray. Kuwa xigay ee hagaajiyay qiyaasaha pi waxay ahaayeen xisaabyahanno Shiineys ah. Qiyaastii Shiinuhu waxay sax ahayd ilaa toddoba lambar, 3.141592.
Giriigga, Archimedes wuxuu adeegsaday geeso badan oo lagu sawiray bannaanka goobo, iyo geeso badan oo lagu sawiray gudaha goobo, wuxuuna pi gaarsiiyay saddex lambar, 3.14. Ugu dambayntii, markii taxanayaasha aan dhammaadka lahayn la horumariyay, qofku wuxuu pi ku xisaabin karay qalin iyo warqad ilaa inta lambar ee uu waqti u hayay. Kaliya markii kombiyuutarradu yimaadeen ayay noqotay arrin macquul ah in pi lagu xisaabiyo hal milyan oo lambar. Halkan, buuggan dhexdiisa, waxaa ku jira natiijooyinkaas.
"Waxay u badan tahay in aanu jirin astaan xisaabeed oo kicisay qarsoodi, jacayl suugaaneed, faham khaldan, iyo xiise bini'aadmi oo la mid ah kan tirada pi."
William L. Schaaf, Nature and History of Pi
McAdams, David E.: -
La kulan Qoraa: David E. McAdams
David E. McAdams waa sheekeeye, bare, iyo sahamiye fikradeed oo cimrigiisii oo dhan ku hawlanaa. Waxbarashadiisa xagga xisaabta ayaa socotay tobannaan sano, wuxuuna leeyahay jacayl qoto dheer oo uu u qabo qorista. David wuxuu qoray buugaag badan oo isku dara waxbarasho iyo mala-awaal, laga bilaabo uruurinta hal-xidhaale carruurta yar yar loogu talagalay ilaa sahaminta faahfaahsan ee joogtooyinka xisaabeed, hagayaasha eraybixinta, iyo agab waxbarasho oo isdhexgal ah, dhammaantood loogu talagalay in laga furo albaabada helidda aqoon cusub.
Socdaalkii David wuxuu ka bilowday fasalka, halkaas oo uu barayay xisaabta dugsiga sare, isagoo helay xaqiiqo uu si joogto ah ugu hogaansamo: carruurtu waxey si fiican wax u bartaan marka ay ku lug leeyihiin, xiiseynayaan, isla markaana madadaalanayaan. Wuxuu arkay farqi weyn oo ka jiray waxbarashada xisaabta, ardaydu waxay la halgamayeen ma aha oo keliya fikradaha, balse sidoo kale luqadda xisaabta lafteeda. Aragtiyaddan ayaa dhalisay buugga All Math Words Dictionary, oo ah ilo dhamaystiran oo caruur-saaxiibtinimo leh si loo xoojiyo eraybixinta xisaabta iyo fahamka guud.
Laakiin David halkaas kuma uusan joogin. Wuxuu bilaabay qorista buugaag xisaabeed oo loogu talagalay da'yarta, buugaag madadaalo leh isla markaana wax bara. Buuggiisa Hal Binni, Laba, wuxuu kaga sheekeynayaa halyeey lacag-penny ah oo si sixir ah lab-laab u koraya, isagoo adeegsanaya xigmado iyo kaftan. Buugga Waa Maxay Waxa Ka Weyn Wax Kasta? (Xad-la'aan) wuxuu carruurta ku barayaa fikradda maskaxda balaarisa ee aan dhammaadka lahayn, "infinity". Buugaagtiisa kale sida Faraaktaalladayda Aan Ugu Jeclahay iyo Buugaagta Mashruuca Shabakadaha Joomatari waxay carruurta ku dhiirrigelinayaan inay baaraan qaabab, tirooyin, iyo jaantusyo si farxad leh oo muuqda.
Buugaagta David badankoodu waa ciyaar leh, maanso u eg, waxaana loo habeeyey inay la jaanqaadaan yaabka adduunka: dinosaurs, sheekooyin dad weyn, hawada sare, boombalooyinka, ciyaarta qarsoodi-doonka, iyo xitaa dulsaarada dugsiga. Qiso kasta ama halxidhaale waxaa si gaar ah loogu farsameeyey in lagu baro isla markaana lagu kiciyo mala-awaalka. Mashruucyadiisii ugu dambeeyey waxaa ka mid ah uruurin boqolaal halxidhaale xisaabeed oo loogu talagalay carruurta lix jirka ah iyo taxane mowduuceedyo isku dara xisaabta iyo wax kasta oo carruurtu jecel yihiin, qorfe baraf leh, raadinta khazaanka, sixir, iyo in ka badan.
Shaqadiisa waxaa loo tarjumay dhowr luqadood, oo ay ku jirto Bangali, taasoo ka dhigaysa habkiisa farxadda leh ee waxbarasho mid ay heli karaan carruur badan oo adduunka dacalladiisa ku nool. Haddi uu tirinayo xiddigaha ama uu baadhayo tirada xisaabta π (pi), David wuxuu bog kasta ku hayaa jacayl iyo xiise dhab ah.
Hadda oo uu hawlgab ka noqday barista, David wuxuu ku raaxaystaa beeraleyda iyo farxadda hal-abuurka qorista. Wuxuu weli qorayaa maalin kasta, isaga oo riyoonaya siyaabo cusub oo uu carruurta ugu tuso quruxda xisaabta, awoodda luqadda, iyo sixirka su'aasha, "Maxaa dhacaya haddii...?"
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