One Dimension

Japanese: 1次元 - いちじげん
One Dimension

…(1) Dimension in mathematics Common sense, as in Euclid's Stoicheia, states that a line is a length without width, a surface has length and width, a solid has length, width and height, and that the end of a line is a point, the end of a surface is a line, and the end of a solid is a surface. For this reason, points are called 0-dimensional figures, lines 1-dimensional figures, surfaces 2-dimensional figures, and solids 3-dimensional figures. This corresponds to the fact that the position of a point is analytically represented by one real number on a line, a pair of real numbers on a surface, and a pair of three real numbers within a solid. …

*Some of the terminology explanations that mention "one dimension" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…(1)数学における次元 常識的には,ユークリッドの《ストイケイア》にあるように,線とは幅のない長さ,面とは長さと幅をもつもの,立体とは長さと幅と高さをもつものとされ,また線の端は点,面の端は線,立体の端は面であるとされている。このような理由で,点を0次元,線を1次元,面を2次元,立体を3次元の図形と呼んでいる。このことは点の位置は解析的には線上では一つの実数で,面上では二つの実数の組で,立体内では三つの実数の組で表されることに対応している。…

※「1次元」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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