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A sangaku dedicated to Konnoh Hachimangu (Shibuya, Tokyo) in 1859.Sangaku or san gaku (Japanese: 算額, lit. 'calculation tablet') are Japanese geometrical problems or theorems on wooden tablets which were placed as offerings at Shinto shrines or Buddhist temples during the Edo period by members of all social classes.
The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics. Additionally, the subsequent columns contains an informal explanation, a short example, the Unicode location, the name for use in HTML documents, [1] and the LaTeX symbol.
A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...
In logical argument and mathematical proof, the therefore sign, ∴, is generally used before a logical consequence, such as the conclusion of a syllogism. The symbol consists of three dots placed in an upright triangle and is read therefore. While it is not generally used in formal writing, it is used in mathematics and shorthand.
The Devil's Sea (Japanese: 魔の海, Hepburn: Ma no Umi), also known as the Devil's triangle, the Dragon's Triangle, the Formosa Triangle and the Pacific Bermuda Triangle, is a region of the Pacific, south of Tokyo. The Devil's Sea is sometimes considered a paranormal location, though the veracity of these claims has been questioned.
Sacred Mathematics: Japanese Temple Geometry is a book on Sangaku, geometry problems presented on wooden tablets as temple offerings in the Edo period of Japan. It was written by Fukagawa Hidetoshi and Tony Rothman , and published in 2008 by the Princeton University Press .
Chinese dragon mythology is the source of Japanese dragon mythology. Japanese words for "dragon" are written with kanji ("Chinese characters"), either simplified shinjitai 竜 or traditional kyūjitai 龍 from Chinese long 龍. These kanji can be read tatsu in native Japanese kun'yomi, [b] and ryū or ryō in Sino-Japanese on'yomi. [c]
komejirushi (米印, "rice symbol") This symbol is used in notes (註, chū) as a reference mark, similar to an asterisk ＊ 2196: 1-1-86: FF0A: hoshijirushi (星印, "star symbol") asterisk (アステリスク, "asterisk") This symbol is used in notes (註, chū) 〽: 1-3-28: 303D: ioriten (庵点) This mark is used to show the start of a ...