Biancani, Giuseppe
,
Aristotelis loca mathematica
,
1615
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204
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Aliæ verò (quarum permultæ in decimo reperiun
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tur) quæ nec longitudine, nec potentia illi ſunt
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commenſurabiles, irrationales appellantur, qua
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lis eſſet media proportionalis E F, inter duas A,
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& C D, in præſenti figura ex 11. 10.</
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id
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">Sciendum præterea ex 37. 10. & ſequentibus,
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quod ex duabus lineis rationalibus reſpectu rationalis expoſitæ. </
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">v. g. A, com
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menſurabilibus inuicem tantum potentia, componitur linea, quæ cum ea
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dem expoſita eſt irrationalis,
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vocaturq́
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; ex
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duobus nominibus, ſiue Binomium, vt ſi ex
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latere A, & diametro C D, componatur li
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nea A C D, erit irrationalis cum rationali
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A,
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abbr
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diceturq́
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; binomium. </
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<
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id
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">Amplius ex 74. 10. & ſequentibus, ſi prædictum
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minus nomen, ſiue minor linea A, detrahatur ex maiori nomine C D, vt re
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linquatur B D linea, erit ipſa reliqua B D, irrationalis, quam poſtea appel
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lant Apotomen, ſiue latinè Reſiduum.</
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<
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">Poſtremò, & hoc non ignorandum ex 43. 10. lineam, ſiue
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binomiũ
">binomium</
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>
A C D,
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non poſſe diuidi in alio puncto, præter C, in duas lineas, quæ ſint rationales
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expoſitæ, & potentia tantum inuicem commenſurabiles.</
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<
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id
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">His præmiſſis textum, ac rationem illorum explicabo in hunc modum.</
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<
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id
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s.003429
">Si quis faciat diuiduam lineam illam, quæ eſt communis
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abbr
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mẽſura
">menſura</
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omnium
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commenſurabilium, ſequetur hoc abſurdum contra demonſtrationes 10.
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quod nulla erit amplius linea rationalis, nec irrationalis, quia ſi communis
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menſura diuidatur, tolletur ea de rerum natura; vnde non erit amplius in
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ter lineas ſymetria vlla, quare neque vllæ erunt rationales, eſſe enim ratio
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nale oritur ex commenſurabilitate. </
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<
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id
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">quare
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neq;
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extabit illa rationalis expo
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ſita, ad quam cæteræ relatæ dicuntur rationales, vel irrationales: quapro
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pter etiam irrationales nullæ erunt,
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abbr
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neq;
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vlla alia erit ex prædictis, veluti
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nec irrationalis illa, quam vocant Apotomen ex Binomio, ſiue ex duobus
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nominibus, de qua Euclides propoſ. </
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<
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">74. 10. & ſequentibus pertractat.</
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<
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id
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(Apotomen ex duobus nominibus compoſitam)
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vni
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ca voce illa
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(Compoſitam)
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addita ab Interprete Iatino, quæ non extat in tex.
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græco, magnum Ariſtoteli imponi erratum, cum hac ratione dicat apoto
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men ex duobus nominibus eſſe compoſitam, quod falſiſſimum eſt. </
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id
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">Apotome
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enim, vt ſupra dictum eſt, ne dum ex duobus nominibus conſtat, verum ip
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ſa eſt reſiduum lineæ maioris, ſi minor ab ipſa detrahatur. </
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<
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id
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s.003434
">Verumenimuero
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vox illa
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type
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(Compoſitam)
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type
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in nullo codice reperitur, quare pro arbitrio, atque
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ex Geometriæ inſcitia addita, tolli debet, ne tantæ inſcitiæ Ariſt. ipſe re
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darguatur. </
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<
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id
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">hæc in hunc locum ſufficiant.</
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<
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">Quartus locus
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(Quod verò de commenſurabilibus lineis poſtremò dicunt, om
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nes vna quadam, & eadem menſura oportere menſurari, falſum eſt admodum, &
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nequaquam Mathematicorum ſuppoſitionibus concordat. </
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<
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id
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">non enim ita ſupponunt
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Geometræ,
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vtile ipſis iſtud foret, imò potius aduerſaretur, lineas omnes com
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menſurabiles eſſe, & omnium commenſurabilium linearum communem menſuram
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exiſtimare. </
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<
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">quamobrem ridiculum eſt eos, qui dicunt ſe demonstrare ex Geometra
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rum decretis, & ex quibus Mathematici docent in contentioſam pariter, ac falla
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