Pedro Ciruelo

Pedro Ciruelo or Pedro Ciruello or Pedro Sánchez Ciruelo , Latin Petrus Sanchez Cirvelus or Petrus Ciruelus Darocensis (* 1470 in Daroca ; † 1554 in Salamanca ) was a Spanish mathematician , theologian and university professor .

Life and career

Cursus quattuor mathematicarum artium liberalium ... ( Alcalá de Henares , Arnao Guillén de Brocar, 1516).

Hexameron theologal sobre el regimiento medicinal contra la pestilencia ( Alcalá de Henares , Arnao Guillén de Brocar, 1519).

Ciruelo first studied in Salamanca and continued his studies of mathematics and theology in Paris from 1492–1502 , where he also taught mathematics and philosophy for ten years . From 1510 he worked as a professor of theology and philosophy at the University of Alcalá and later became canon at the Cathedral of Salamanca. From around 1530 he also taught at the University of Salamanca . He was also one of the teachers of the future King Philip II of Spain.

Scientific work

In his scientific work, Ciruelo mainly dealt with arithmetic and geometry and also with logic , astronomy (including astrology ), music and natural philosophy .

Fonts

Ciruelo published a treatise on practical arithmetic as early as 1495 , the Arithmetice practice seu Algorismi Tractatus . Shortly thereafter, in the years up to 1498, he presented revised versions of textbooks by other authors , namely a revision of the Arithmetica speculativa and the Geometria speculativa by Thomas Bradwardine and then one of the Sphaera mundi written by Johannes de Sacro Bosco (and others) .

Building on works by various predecessors - such as the textbook De institutione arithmetica written by Boethius - Ciruelo dealt in detail with the Quadrivium of the Seven Liberal Arts in the Cursus quattuor mathematicarum artium liberalium published in 1516 . This font is characterized by numerous historical annotations and is also noteworthy insofar as Ciruelo used new names for the certain powers of ten , which differ from the usual names that have become common through the work of Nicolas Chuquet . He described namely as a cuento and as millon . ${\displaystyle 10^{6}}$ ${\displaystyle 10^{12}}$

swell

• Moritz Cantor (Hrsg.): Lectures on the history of mathematics . Second volume: From the year 1200 to the year 1668 (=  Bibliotheca Mathematica Teubneriana . Volume 7 ). BG Teubner Verlagsgesellschaft , Stuttgart 1965, p. 105 ( MR0195665 ).
• Siegfried Gottwald , Hans-Joachim Ilgauds and Karl-Heinz Schlote (ed.): Lexicon of important mathematicians . Verlag Harri Deutsch , Thun 1990, ISBN 3-8171-1164-9 , p. 105 ( MR1089881 ).

Individual evidence

1. ↑ See Wikisource !
2. ↑ See Internet archive and entry at WorldCat !
3. ↑ See entry at WorldCat !
4. ^ Moritz Cantor: Lectures .... Second volume. 1965, pp. 386-387
5. ↑ See entry on Google !