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The Berlin Papyrus 6619, simply called the Berlin Papyrus when the context makes it clear, is an ancient Egyptian papyrus document from the Middle Kingdom,〔Corinna Rossi, ''Architecture and Mathematics in Ancient Egypt'', Cambridge University Press 2004, p.217〕 second half of the 12th or 13th dynasty.〔Marshall Clagett, Ancient Egyptian Science, Vol 3, 1999 (), p.249.〕 The two readable fragments were published by Hans Schack-Schackenburg in 1900 and 1902.〔 (vol. 36-39, pages 506–514), .〕 The papyrus is one of the primary sources of ancient Egyptian mathematics.〔Williams, Scott, (Egyptian Mathematical Papyri ), SUNY-Buffalo〕 The Berlin Papyrus contains two problems, the first stated as "the area of a square of 100 is equal to that of two smaller squares. The side of one is ½ + ¼ the side of the other."〔Richard J. Gillings, ''Mathematics in the Time of the Pharaohs'', Dover, New York, 1982, 161.〕 The interest in the question may suggest some knowledge of the Pythagorean theorem, though the papyrus only shows a straightforward solution to a single second degree equation in one unknown. In modern terms, the simultaneous equations and reduce to the single equation in ''y'': , giving the solution ''y'' = 8 and ''x'' = 6. ==See also== * Papyrology * Timeline of mathematics * Egyptian fraction 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Berlin Papyrus 6619」の詳細全文を読む スポンサード リンク
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