…In this way, differential geometry, which uses calculus to study the properties of curves and surfaces, began. At the beginning of the 19th century, differential geometry was established as a branch of mathematics when Gauss established the foundations of surface theory and developed geometry on surfaces. Later, in the 19th century, O. Bonnet (1819-92), E. Beltrami (1835-1900), MS Lee, JG Darboux and others found many interesting results about curves and surfaces in Euclidean space. In the 20th century, influenced by Klein's ideas, G. Fubini and others studied projective differential geometry, which uses differential calculus to study the properties of curves and surfaces in projective spaces that are invariant under projective transformations, and similar differential geometry for various other spaces was studied by W. Blaschke (1885-1962 and others. … *Some of the terminology that mentions "Bonnet, O." is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このようにして,微積分学を用いて曲線や曲面の性質を研究する微分幾何学が始まったが,19世紀の初めに,ガウスが曲面論の基礎を確立し,曲面上の幾何学を展開するに及んで,数学の一分科としての微分幾何学が成立した。この後,19世紀にはボネO.Bonnet(1819‐92),ベルトラミE.Beltrami(1835‐1900),M.S.リー,J.G.ダルブーらによって,ユークリッド空間における曲線や曲面についての多くの興味ある結果が見いだされた。20世紀に入ると,クラインの思想の影響を受けて,射影空間の曲線や曲面の射影変換で不変な性質を微分学を用いて研究する射影微分幾何学がフビニG.Fubiniらによって研究され,その他のいろいろな空間に対しても同様の微分幾何学がブラシュケW.Blaschke(1885‐1962)らによって研究された。… ※「Bonnet,O.」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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