Petri Philomeni de Dacia in algorismum vulgarem Johannis de Sacrobosco commentarius. Una cum algorismo ipso edidit et praefatus est Maximilianus Curtze.
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partium est centum. Omnis igitur ille numerus, qui ex puris denariis componitur, sive in decem praecise resolvitur, est articulus. Sequitur pars illa: Compositus sive mixtus, in qua notificat, quid sit numerus compositus sive mixtus, et facit duo. Primo enim facit, quod dictum est, et secundo dat regulam et 5 modum cognoscendi universaliter omnem numerum compositum sive mixtum ibi, cum dicit: Et sciendum. Dicit primo, quod numerus compositus sive mixtus est, qui constat ex digito et articulo, ut XI, XII etc, XXI, XXII,.XXI, XXXII etc, C1, CII etca. Tune sequitur illa pars: Et sciendum est, quod omnis numerus to etca, in qua dat regulam et modum cognoscendi omnem numerum compositum sive mixtum; et est ille, qui est inter duos articulos proxinos. Et est notandum, quod articuli proximi sunt, quorum unus excedit alium tantum in denario, ut X et XX, vel XX et XXX etca, vel C et CX, vel CX et CXX etca. 15 Item nota, quod ille numerus dicitur esse inter duos numeros, qui maior est uno iliorumt et minor altero; et hoc modo quatuor sunt inter tria et quinque. Cum igitur decem et XX sic se habent, quod uterque est articulus, et alter excedit alterum tantum in decem, illi sunt articuli proximi. Omnes igitur nu- 20 meri, qui sunt inter istos duos articulos, erunt compositi, quia semper quilibet eorum maior erit quam X, et minor quam XX; ratione enim, qua XV excedit X, continet X, et sic articulum, et ratione, qua exceditur a XX, continet digitum. Sequitur illa pars: Huius autem artis, in qua tangit causam formalem huius 25 artis et tractatus. Et est notandum, quod duplex est forma artis scilicet et tractatus. Quaedam enim est forma artis sive tractatus in se, et haec consistit in divisione artis sive tractatus in capitula et capituloruin in suas partes; alia autem est forma artis sive tractatus, quae est modus quidam, quomodo ars est 30 tradita; et modus iste aliquando est divisivus, aliquando diffinitivus, hliquando exemplorum positivus, aliquando etiam probativus et improbativus. Cum igitur dicitur, quod in hac parte ultima prohemii tangitur causa formalis huius artis sive tracta
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About this Item
- Title
- Petri Philomeni de Dacia in algorismum vulgarem Johannis de Sacrobosco commentarius. Una cum algorismo ipso edidit et praefatus est Maximilianus Curtze.
- Author
- Sacro Bosco, Joannes de, fl. 1230.
- Canvas
- Page 20
- Publication
- Hauniae,: A. F. Host,
- 1897.
- Subject terms
- Arithmetic
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https://name.umdl.umich.edu/acv7283.0001.001
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"Petri Philomeni de Dacia in algorismum vulgarem Johannis de Sacrobosco commentarius. Una cum algorismo ipso edidit et praefatus est Maximilianus Curtze." In the digital collection University of Michigan Historical Math Collection. https://name.umdl.umich.edu/acv7283.0001.001. University of Michigan Library Digital Collections. Accessed May 29, 2025.