...Its foundations were established by J. V. Poncelet, who discovered that anharmonic ratios are projective properties and that duality in projective geometry is also found in them. Following this, J. Steiner (1796-1863) showed that quadratic curves and surfaces can also be treated projectively, AF Möbius and J. Plücker introduced coordinates and established projective geometry as analytic geometry, and K. G. von Staudt (1798-1867) established it as synthetic geometry based on Desargues' theorem. *Some of the terminology references "Staudt, KGCvon" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…その基礎は,非調和比が射影的性質であることや,射影幾何学の双対性を見いだしたJ.V.ポンスレによって築かれた。これを継承して,シュタイナーJ.Steiner(1796‐1863)は二次曲線や二次曲面も射影的に扱えることを示し,A.F.メービウスやJ.プリュッカーは座標を導入して射影幾何学を解析幾何学として建設し,またシュタウトK.G.C.von Staudt(1798‐1867)はデザルグの定理を基としてそれを総合幾何学として建設した。 ※「Staudt,K.G.C.von」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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