ロバート・レコード
(Robert Recorde から転送)
出典: フリー百科事典『ウィキペディア(Wikipedia)』 (2022/06/10 02:04 UTC 版)
ロバート・レコード(Robert Recorde、1512年ごろ – 1558年)は、ウェールズの物理学者、数学者。1557年に等号(=)を考案し、英語話者に対し既に存在していた加号(+)を紹介した[1]。
- ^ a b c Johnston (2004年). “Recorde, Robert (c. 1512–1558)”. Oxford Dictionary of National Biography. Oxford University Press. doi:10.1093/ref:odnb/23241. 2012年1月26日閲覧。
- ^ 矢野健太郎 『数学質問箱なぜだろう?そこが知りたい!』講談社、1979年12月20日、40頁。
- ^ Newman, James R. (1956). The World of Mathematics
- ^ Jourdain, Philip E. B. (1913). The Nature of Mathematics
- ^ Robert Recorde, The Whetstone of Witte (London, England: John Kyngstone, 1557), p. 236 (although the pages of this book are not numbered). From the chapter titled "The rule of equation, commonly called Algebers Rule" (p. 236): "Howbeit, for easie alteration of equations. I will propounde a fewe examples, bicause the extraction of their rootes, maie the more aptly bee wroughte. And to avoide the tediouse repetition of these woordes: is equalle to: I will sette as I doe often in worke use, a paire of paralleles, or Gemowe [twin, from gemew, from the French gemeau (twin / twins), from the Latin gemellus (little twin)] lines of one lengthe, thus: = , bicause noe .2. thynges, can be moare equalle." (However, for easy manipulation of equations, I will present a few examples in order that the extraction of roots may be more readily done. And to avoid the tedious repetition of these words "is equal to", I will substitute, as I often do when working, a pair of parallels or twin lines of the same length, thus: = , because no two things can be more equal.)
- ^ The Urinal of Physick, by Robert Recorde, 1548; at Google Books
- ^ John Hall, "An Historiall Expostulation", p. 60. In Early English Poetry, Ballads, and Popular Literature of the Middle Ages, v. XI. London: T. Richards, 1844
- 1 ロバート・レコードとは
- 2 ロバート・レコードの概要
- 3 参考文献
- 4 外部リンク
- ロバート・レコードのページへのリンク