スギモト タケシ   Sugimoto Takeshi
  杉本 剛
   所属   神奈川大学  工学部 情報システム創成学科
    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.