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Arabus et Latinus

Α Β Γ Δ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο Π Ρ Σ Τ Υ Φ Χ Ψ Ω α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ ς τ υ φ χ ψ ω
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Work C.1.20

Tractatus super propositiones Ptolomei de sinubus et chordis


‘(Vienna, ÖNB, 5203) ‘Tractatus sinuum et chordarum Georgii Peurbachii. Sinuum, cordarum et arcuum noticia ad celestium motuum cognitionem pervalde necessaria existit, ideo de eorum doctrina restat in presenti perquirendum — Et similiter sciemus quantitates reliquarum chordarum, facilis ergo est secundum premissorum tenorem cordarum ad suos arcus cognitio. Finis.’


Explanation of six propositions on sines and chords.


Written by Peurbach, who took over parts of John of Gmunden’s De sinubus, chordis at arcubus.


H. H. L. Busard, Der Traktat de sinubus, chordis et arcubus von Johannes von Gmunden, Wien, 1971, 75; H. Grössing, Humanistische Naturwissenschaft. Zur Geschichte der Wiener matematischen Schulen des 15. und 16. Jahrhunderts, Baden-Baden, 1983, 106 and 115-116; R. Lorch, ‘Some Remarks on the Almagestum parvum’, in Amphora. Festschrift für Hans Wussing zu seinem 65. Geburtstag, eds S. S. Demidov, M. Folkerts et al., Basel-Boston-Berlin, 1992, 407-438: 422.