研究者情報 | 神奈川大学

スギモト　タケシ Sugimoto Takeshi 杉本　剛所属神奈川大学情報学部システム数理学科神奈川大学大学院工学研究科工学専攻（情報システム創成領域）職種教授
言語種別	日本語
発行・発表の年月	2013/08
形態種別	学術雑誌
査読	査読あり
標題	Discourse on the Latus Rectum in Conics
執筆形態	単著
掲載誌名	Symmetry: Culture and Science
巻・号・頁	24(1-4),295-309頁
概要	The geometric measures of conics are a 'latus rectum' and an 'eccentricity.' The latus rectum is a mathematical concept as well as an entity, e.g., a particular chord etc., embedded in a cone and its conic sections. The latus rectum has been consistently a length scale in conics, but its name and definition have been diversely changing from era to era for 2000 years: from 'orthia' in Greek mathematics to a 'latus rectum' in Latin, and branching off with 'parameter' ; the novel methods of constructing conics are shown by using the latera recta; natures of principal and non-principal latera recta are compared to understand modern definitions.