Ceva, Giovanni, Geometria motus, 1692

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              ſunt, componentur ex rationibus temporum, & ex rationi­
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              bus æquatricum. </s>
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              Def.
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              6.
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              Ax.
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              1.</s>
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              Cor.
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              3.
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              Def.
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              3.
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              huius.
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            <p type="margin">
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              Pr.
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              2.
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              huius.
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            <p type="main">
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              Corollarium I.
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              Hinc patet ſi lineæ, quæ in imagine velocitatum tempus
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              exhibet, aplicetur rectangulum æquale propoſitæ imagini ve­
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              locitatum, fore vt latitudo eiuſdem rectanguli, ſit velocitas
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              æquatrix propoſitæ imaginis.
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              Corollarium II.
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              Item constat, vbi tempora, vel æquatrices velocitates fue­
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              rint æquales, rationem ſpatiorum eſſe eandem, quæ æquatri­
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              cum, vel quæ temporum.
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            <p type="main">
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              LEMMA.
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              Si quælibet ratio compoſita ſit ex quotcumque rationibus,
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              harum quælibet nectetur ex propoſita, & ex reliquis contra­
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              riò ſumptis rationibus. </s>
              <s id="s.000159">Sit A ad B compoſita ex rationibus E
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              æd F; G ad H; & I ad K. </s>
              <s id="s.000160">Dico quamlibet ist arum puta G ad
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              K conſtare ex rationibus A ad B, & ex reliquis reciprocè ſum­
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              ptis F ad E, & I ad K. </s>
              <s id="s.000161">Vt E ad F, ita ſit A ad C, & vt D ad B
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              ſic I ad K; erit C ad D, vt G ad H;
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              C ad D, hoc eſt G ad
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              H nectetur ex C ad A, ſeu F ad G, & ex rationibus A ad B,
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              B ad D, ſiue K ad I. </s>
              <s id="s.000162">Quod &c.
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          </chap>
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