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Julio Cesar Firrufino or Ferrufino (16th century) was an engineer and mathematician who had a chair in mathematics in Madrid from 1604 to 1650. == Life and work == He was the son of Julian Firrufino (ca 1535-1604), born in Alessandria (Duchy of Milan) who had also a chair in Geometry and Artillery granted by the king of Spain.〔, page 8.〕 However, we know few biographical data of Julio Cesar, his son.〔, page 172.〕 Only from a document dated 1644, we know he was 66 years old, so we can suppose he was born in 1578, when his father had a chair of Naval Artillery in the ''Casa de Contratación'' and, probably, he was born in Sevilla.〔, page 174.〕 In 1600 he was assistant of the Spanish minister of Artillery〔, page 175.〕 and from 1604, after the death of his father, he was appointed to a chair on Mathematics and Fortification,〔It is not clear in which academic institution, see , pages 177-178.〕 after the approval of Andrés García de Céspedes and João Baptista Lavanha who examined him.〔, page 99.〕 He was in charge of the chair until 1650, one year before his death; in this date he was replaced by his student Luis Carduchi, member of a family of old friends of Firrufino.〔, pages 179-180.〕 In 1626 he published ''Plática Manual y Breve Compendio de Artillería'', which was an abstract of a treatise of artillery that he was not allowed to publish by political reasons.〔, pages 181-182.〕 In 1638 he was accused by fraud in the production of 66 artillery guns in Sevilla; for this reason he was imprisoned during some time in 1644.〔, pages 183 i ss.〕 In 1648 was published his most important work: ''El perfecto artillero'', which is an encyclopedic treatise, but not much original, based in Tartaglia ideas.〔, page 596.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Julio Cesar Firrufino」の詳細全文を読む スポンサード リンク
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