...Around the 5th century, the Indian Āryabhaṭa gave 3.1416 as an approximation of π, and the Chinese Zu Chongzhi gave 22/7 and 355/113. In the 16th century, Rudolf S. von Rudorff (1540-1610) calculated an approximation of π to 35 decimal places, and the French F. Viète obtained the following formula (Figure). After the discovery of calculus in the 17th century, formulas such as the following that link π to definite integrals were obtained, and these were used to obtain formulas that express π as the sum of an infinite series or as various types of limit values, making it possible to precisely calculate approximations of π. ... *Some of the terminology that mentions "Rudorff, S. von" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…5世紀ころには,πの近似値としてインドのアールヤバタĀryabhaṭaは3.1416を,中国の祖沖之は22/7や355/113を得ている。16世紀には,ルドルフS.von Rudorff(1540‐1610)はπの近似値を小数点以下第35位まで計算し,フランスのF.ビエトは次に示すような公式を得た(図)。17世紀に入って微積分が発見されてからは,のようなπを定積分に結びつける式が得られ,これらを用いて,πを無限級数の和,あるいは種々の形の極限値として表示する式が得られ,πの近似値も精密に計算できるようになった。… ※「Rudorff,S.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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