Apollonii Pergaei quae graece exstant cum ... - Wilbourhall.org

Apollonii Pergaei quae graece exstant cum ... - Wilbourhall.org Apollonii Pergaei quae graece exstant cum ... - Wilbourhall.org

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84 KSiNIKSiN d'. ©z/, xal iTCS^Evx^^ ri AJ^ xal Slcc tov E Ttaga trjv ^z/ 7]x^G) ri EBF, Tcal ccTto tov © dsvtBQa dLa^stQOg riX^Gi t^v avtLKSL^svcov rj @KA' ts^st drj trjv AA ^Cya nata to K. aal sxatsQa aga tcov EB, EF dCxa jj 5 TSt^rjtaL Tiata tb A. larj aQa rj BA trj AF' otcsq advvatov. ovk aQa 6v^7ts0ovvtaL Tcat alko Grj^stov. vy . Eav vjisQ^oXri iiLag tav avtLXSLfisvov nata dvo 0r}^sia scpaTttrjtaL^ r} avtLKSL^svrj avtfj tij itSQa tcov 10 aVtLKSL^SVOV OV 6V^7tS6SLtaL. s(5to6av dvTLKSL^svaL at AAB^ E, Tcal VTtSQ^oXri 7] AF tijg AAB ig)a7tts6d^co xata dvo ^rj^sta ta A, B, xal s6tco dvtLKSL^svri r^g AF rj Z, ^syco, otL rj Z tfi E ov 6v^7ts6sttaL. 15 SL yccQ dvvatov, (5vyL7tL7ttstco xata to E, xal ijx^co- Cav d7tb tcov A, B scpa^tto^svaL tav to^dov at AH, HB, Tcal STts^svx^^ V AB Tcal ri EH Tcal SK^s^lr^aO^co' xs^st drj 20 Tcat^ aXXo xal aXXo ai^- ^stov tag to^dg. s6tco drj ag rj EHrA&. i7ts\ ovv i(pd7ttovraL at AH, HBy xal rj AB tdg dcpdg i^tstsv^sv, sOtat iv 25 fisv tfi stsQcc av^vyLa, dtg r] &E TtQog EH, rj &A TtQbg AH, iv ds tfj stsQa rj ®r 7tQbg FH 07tSQ ddvvatov. ovK ccQa 7] Z tfj E av^^dXlsL.

AH, CONICORUM LIBER IV. 85 Aj A sectiones contingentes ducantur A&^ SJ, ducaturque A^y et per E rectae AJ parallela ducatur EBFy a ® autem secunda diametrus oppositarum ducatur ®KA^)\ ea igitur in K rectam AA in duas partes aequales secabit [II, 39]. itaque etiam utraque EBj EF in A in binas partes aequales secta est [I def. 4]. quare BA = AF'^ quod fieri non potest. ergo in alio puncto non concurrent. LIII. Si hyperbola alteram oppositarum in duobus punctis contingit, sectio ei opposita cum altera oppositarum non concurret. sint oppositae AAB^Ej et hyperbola AF sectionem AAB m duobus punctis A, B contingat, sitque sectioni AF opposita Z. dico, Z cum E non concurrere. nam si fieri potest, in E concurrat, et ab A^ B sectiones contingentes ducantur AHj HBj et ducatur AB ei EHf quae producatur; sectiones igitur in alio atque alio puncto secabit. uelut sit EHrA0. quoniam igitur AH^ HB contingunt, et AB puncta contactus coniungit, in alteris sectionibus coniugatis erit EH in alteris autem ®E : = '. &^ ®E'.EH=®r'.rH 1) Aiit cum Comin. &A K scribendum aut figura cum Halleio mutanda (in fig. codicis F, B permutatae sunt). sed omnino liaec demonstratio minus recte expressa est.

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