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Edmond Halley’s Reconstruction of the Lost Book of Apollonius’s Conics: Translation and Commentary PDF

142 Pages·2012·2.43 MB·English
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Preview Edmond Halley’s Reconstruction of the Lost Book of Apollonius’s Conics: Translation and Commentary

Sources and Studies in the History of Mathematics and Physical Sciences ManagingEditor J.Z.Buchwald AssociateEditors J.L.Berggren and J.Lu¨tzen AdvisoryBoard C. Fraser, T.Sauer, A. Shapiro Forfurthervolumes: http://www.springer.com/series/4142 Michael N. Fried Edmond Halley’s Reconstruction of the Lost Book of Apollonius’s Conics Translation and Commentary ABC MichaelN.Fried ProgramforScienceandTechnologyEducation Ben-GurionUniversityoftheNegev MarcusFamilyCampus Beer-Sheva84105 Israel [email protected] ISBN978-1-4614-0145-2 e-ISBN978-1-4614-0146-9 DOI10.1007/978-1-4614-0146-9 SpringerNewYorkDordrechtHeidelbergLondon LibraryofCongressControlNumber:2011933227 ©SpringerScience+BusinessMedia,LLC2011 Allrightsreserved.Thisworkmaynotbetranslatedorcopiedinwholeorinpartwithoutthewritten permission of the publisher (Springer Science+Business Media, LLC, 233 Spring Street, New York, NY10013, USA),except forbrief excerpts inconnection with reviews orscholarly analysis. Usein connectionwithanyformofinformationstorageandretrieval,electronicadaptation,computersoftware, orbysimilarordissimilarmethodologynowknownorhereafterdevelopedisforbidden. Theuseinthispublicationoftradenames,trademarks,servicemarks,andsimilarterms,eveniftheyare notidentifiedassuch,isnottobetakenasanexpressionofopinionastowhetherornottheyaresubject toproprietaryrights. Printedonacid-freepaper SpringerScience+BusinessMedia(www.springer.com) FormyparentsDanand Thelma Preface The present translation of Halley’s reconstruction of Book VIII of Apollonius’s Conicswascarriedoutoverthecourseofseveralyears.IttookthatlongbecauseI wearanotherhat;namely,thatofalecturerinaprogramforscienceandtechnology education.And,inthatfield,translatingandcommentingonearly18thcenturyre- constructionsofancientGreekmathematicalworks,unfortunately,hasasomewhat lowpriority. Still, though my interest in Halley’s reconstruction of Conics VIII grew origi- nally outof previouswork I haddoneon ApolloniusofPerga,the moreI worked onthetranslationandthoughtaboutHalley,themoreIbegantoseethattheproject actuallyspoketomyeducationalinterestsaswell.Ihavelongbeenconcernedwith therolethathistoryofmathematicscanplayinmathematicseducation.Ihavehadto askmyselfinthisconnectionwhatexactlydoesastudentofmathematicsgainfrom history?ThiswasthequestionthatpreoccupiedmemoreandmoreaboutEdmond Halley. Thoughhe was a master of the modern and increasingly powerfulmathe- maticsofhistime,Halleytreatedtheancientmathematicianswithgreatseriousness. Why? What did he see himself learning fromengagingwith mathematicianssuch asApollonius? This really became for me the main question in the backgroundof the present work.OfcourseoneshouldalsoaskhowfarHalley’sreconstructionofBookVIII succeededinreproducingApollonius’sownthoughtandthislostbookoftheCon- ics.Afterall,thatwasHalley’simmediategoal,andwhatheproducedinthisregard washardlytrivial.Indeed,asapersonwhohasspentmanyyearsstudyingtheCon- ics, I am tremendously impressed by the profundity of Halley’s understanding of Apollonius.Ultimately,Halley’sreconstructionofBookVIIIismoreaboutHalley than about Apollonius. It is, in a way, the portrait of this man’s deep relationship withthepast. AsIremarkedattheoutset,myownhistoricalworkhasoftenhadtotakeaback- seat to otherinstitutionalobligations.Duringa periodwhen I feltthis particularly acutelyanddespairingly,IwasurgedtotakeuptheHalleyprojectbyadearfriend and, by all accounts, a brilliant anthropologist, Tania Forte. Tania persuaded me thatwithoutsuchaprojectIwoulddriftinexorably,asahistorianofmathematics, vii viii Preface toward the River of Lethe. So, to Tania I must offer my very first thanks. Sadly, Tania will never read this: she died suddenly and tragically in 2005, just as she wasbeginningherownpromisingcareerandjustasIwasmakingmyfirststepsin thistranslationandcommentary.AfterTania,ImustthanknextJohnNeufromthe historyofsciencelibraryattheUniversityofWisconsinwhogenerouslymadethe text of Halley’s reconstruction available to me when I was working on my Ph.D. some ten yearsago. I am still touched by the kindnesshe showed me then. I also want to thank Gideon Freudenthal, who managed to find for me Halley’s preface totheentire1710editionoftheConics,whichIcouldnotfindinthebestlibraries hereinIsrael.MayerGoldberghelpedmeobtainpapersonHalley’sactuarialwork and,moreimportantly,providedinvaluablehelpinallthingsdigital,nottospeakof wonderfullonghoursofconversationovercoffee.ThroughoutmyworkonHalley’s Book VIII, Sabetai Unguruwas my constant advisor:he was always the first per- sonIturnedtowhenIhadquestions,doubtsorideasthatneedingworkingthrough andheneverfailedme.Iowetohimdeepthanks,notonlyforthis,butalsoforhis encouragementandwarmfriendship. ThanksarealsoduetoMarinusTaisbakwhoneverturnedmeawaywhenIcame to him with Latin problems. I also want to thank my friend and fellow historian of Greek mathematics, Alain Bernard, with whom I discussed the reconstruction onseveraloccasions.Theintroductionbelowowesmuchtomyconversationswith Alain. LennartBerggren,who read the manuscriptwith a fine-toothedcomb, also deservesthanks:hismanycommentsandsuggestionshavemadethisamuchbetter workthanitwaswhenhefirstreceivedit. Finally,Iamgratefultomywife,Yifat,whotrulysupportedmeinthisproject, saying often, “I think you should put everything else away today and work on Halley.” Although the work might have been begun without her, without her, it wouldneverhavebeencompleted. Beer-Sheva MichaelN.Fried April,2011 Contents PartI Introduction 1 EdmondHalley:AncientandModern ............................ 3 2 Apollonius’sConics............................................. 7 3 ThePathtoHalley ............................................. 13 4 Halley’sGeneralStrategyforReconstructingConics, BookVIII .... 17 5 Halley’sDialoguewiththePast .................................. 23 6 ANoteontheTranslation....................................... 33 PartII ApolloniusofPerga’sOnConics:BookEightRestored APOLLONIUS OF PERGA’S ON CONICS: BOOK EIGHT RESTOREDORTHEBOOKONDETERMINATEPROBLEMS CONJECTURED................................................... 37 PartIII SynopsisandAppendices SynopsisoftheContentsofHalley’sConics,BookVIII .................117 PropositionsI-IV:TheParabolaandInitialPropositionsfortheEllipse andHyperbola .............................................117 PropositionsV-XVIII:ConjugateDiameters.........................117 ScholiumSpecialCasesofthe“ApplicationofAreas”.................119 PropositionsXIX-XXXIII:DiametersandtheirLateraRecta...........119 ix

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Apollonius’s Conics was one of the greatest works of advanced mathematics in antiquity. The work comprised eight books, of which four have come down to us in their original Greek and three in Arabic. By the time the Arabic translations were produced, the eighth book had already been lost. In 1710,
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