Viviani, Vincenzo
,
De maximis et minimis, geometrica divinatio : in qvintvm Conicorvm Apollonii Pergaei
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">Si quotcunque rectæ lineæ terminatæ (non minus verò quam
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tres) cuiuslibet longitudinis, ad vnum idemque punctum occur-
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rant, totidem angulos inter ſe æquales conſtituentes, & </
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<
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rectos complentes. </
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<
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xml:space
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">Erit aggregatum harum ſimul omnium occur-
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rentium, MINIMVM aggregatorum rectarum, à quibuſcunque
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alijs aſſumptis punctis, ad eoſdem datarum terminos eductarum.</
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</
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<
s
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">SInt quotcunque rectę A B, A C, A D, A E, A F, A G terminatę, quę
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ad punctum A ſimul occurrant, conſtituantque angulos B A C, C A
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D, D A E, E A F, F A G, G A B inter ſe æquales, & </
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<
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quatuor rectis: </
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<
s
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xml:space
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">dico aggregatum harum omniũ minus eſſe aggregato linea-
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rum, quæ ex quolibet alio puncto I ad eoſdem terminos B, C, D, E, F, G,
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educi poſſunt, quales ſunt I B, I C, I D, I E, I F, I G.</
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<
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<
s
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">Sit enim A G _MAXIMA_ ductarum ex A, ſuper qua ſumatur A P ipſa A
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G non minor, cui demantur æquales A H, A L, A M, A N, A O, & </
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<
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pleatur polygonum H L M N O P, quod erit æquilaterum, & </
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ſiue regulare, cum anguli ad A ſint æquales, eiuſque centrum erit A; </
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<
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que iungantur I H, I L, I M, I N, I O, I P.</
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<
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<
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">Iam aggregatum ductarum A H, A L, A M, A N, A O, A P ex centro
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A ad angulos polygoni, cum ſit _MINIMVM_, erit minus aggregato
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Append.</
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rum I H, I L, I M, I N, I O, I P ex puncto I, ſed harum aggregatum mi-
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nus eſt aggregato binarum I B, B H; </
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F O; </
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<
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">nam I B, B H maiores ſunt I H, & </
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L, &</
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<
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<
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">quare eò magis aggregatum, ex A ductarum, A H, A L, A M, A
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N, A O, A P minus erit aggregato binarum I B, B H; </
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<
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M; </
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<
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H, C L, D M, E N, F O, G P, erit reliquum aggregatum datarum A B,
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A C, A D, A E, A F, A G minus reliquo aggregato ductarum I B, I </
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