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d'Alfonso in alcuna varietà sensibile essere varie; donde dimostrò che Io strumento dell'astrolabio, misurato secondo la tavole toletane, il quale noi usiamo frequentemente, devia dalle regole d'astrologia: e quelli astronomi che di quindi pigliavano argomento dell'arte essere ingannati. Costui di tutti quelli del tempo nostro fu il primo che compose un
Taccuino e di futuri avvenimenti compose molti annali
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Questi fu geometra grandissimo, e peritissimo aritmetico e però nelle adequazioni astronomiche tutti gli antichi e moderni passò. Questi fu diligentissimo osservatore delle stelle e del movimento de'cieli, e dimostrò che al moderno tempo le tavole toletane erano o di poca o di niuna utilità e quelle
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Nell'anno 1345, di'28 di Marzo, poco dopo l'ora di nona, secondo l'adequazione di mastro Pagolo, figliuolo di ser Piero, grande maestro in questa scienza d'astrologia, fu la congiunzione di
Saturno e di Giove a gradi venti del segno dell' Aquario coll'infrascritto aspetto degli altri
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Il
Dagomari a moltissimi, anzi a infiniti nella nostra Firenze fu in aritmetica diligentissimo maestro, rinovellatore di buone e utilissime regole, e principiò a scorgere la nostra città alle utili e leggiadre regole dell'algoritmo inaudito e morto per moltissimi
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1. If you wish to write down many figures, make a period at every third figure beginning from the right hand and going towards the left, and then you will have as many thousands as are in front of the
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as a device for separating numbers into groups of three for easing calculations on the order of thousands and millions. He is most famous for his work on
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of the quarter of S. Spirito from May–June. Paolo died in
Florence and was buried in Santa Trinita under a now-lost epitaph. His portrait, in
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15. If you wish to multiply fraction by fraction, multiply the numerators with one another, and the denominators similarly.
99:(astronomer). He reputedly had 6,000–10,000 pupils over the course of his life, being praised by contemporaries like
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2. If you wish to multiply numbers ending with a zero, multiply their figures and put all of the zeros at the end.
136:. The need for mathematics among the bankers and merchants of Florence led him to found a school of arithmetic (
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122:, the son of Piero Dagomari, who had moved to Florence. At Florence Paolo became the private tutor of
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32. If you multiply the width of a circle by 22 and divide by 7, you will have the circumference.
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193:, a manual of elementary arithmetic, written in 1340. Some of the "little rules" are:
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Cronica di
Giovanni Villani a miglior lezione ridotta coll'aiuto de'testi a penna
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288:(New York: Columbia University Press, 1951), p. 341 n2.
245:, ed. Giammaria Mazzuchelli, Florence, 1847, p. 45).
189:. His most important mathematical treatise was the
27:
Florentine mathematician and astronomer (1282–1374)
284:Robert Sabatino Lopez and Irving W. Raymond,
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262:, Vol. VII, book XII, chapt. XLI, p. 105).
286:Medieval Trade in the Mediterranean World
213:
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243:Le vite d'uomini illustri fiorentini
185:, which we today would recognise as
161:In mathematics Paolo introduced the
57:, "Paul the Geometer"), was a noted
324:14th-century Italian mathematicians
275:(Franz Steiner Verlag, 2002), p. 59
88:(arithmetician and astronomer) and
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154:, is painted on the vault of the
130:, who praised him highly in his
133:De genealogia deorum gentilium
34:Text from a manuscript of his
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76:) that he gained the epithet
45:(1282–1374), known in
86:Paolo Arismetra e Astrologo
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314:14th-century Italian poets
101:Giovanni Gherardi da Prato
38:in Paolo's own handwriting
72:(master/teacher of the
43:Paolo Dagomari da Prato
226:Paradiso degli Alberti
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146:. In 1363 he held the
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18:Paolo dell'Abbaco
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156:Galleria degli Uffizi
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70:maestro dell'abbaco
319:Italian male poets
271:Markus A. Denzel,
128:Giovanni Boccaccio
118:Paolo was born at
40:
228:, Vol. II, p. 99)
139:bottegha d'abacho
78:Paolo dell'Abbaco
55:Paolo il Geometra
36:Trattato d'Abbaco
16:(Redirected from
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126:and a friend of
124:Jacopo Alighieri
109:Giovanni Villani
82:Franco Sacchetti
51:Paulus Geometrus
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105:Filippo Villani
97:Paolo Astrologo
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93:Paulo Strolago
90:Giorgio Vasari
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177:) that fused
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175:aequationibus
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144:Santa Trinita
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62:mathematician
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309:1374 deaths
304:1282 births
84:called him
298:Categories
183:arithmetic
66:astronomer
59:Florentine
191:Regoluzze
171:equations
68:, such a
198:periods.
179:geometry
148:priorate
256:pianeti
187:algebra
113:Cronica
111:in his
222:secoli
163:period
152:fresco
107:, and
74:abacus
209:Notes
167:comma
142:) at
120:Prato
47:Latin
181:and
64:and
165:or
95:or
49:as
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