Etymology of the Korean currencies Etymology of the Korean currencies The won is the currency of both North and South Korea. "Won" is a cognate of the Chinese currency unit, the yuan, and the Japanese currency unit, the yen, meaning "round object". The won is subdivided into 100 jeon (전; 錢; McCune-Reischauer: "chŏn"; Revised Romanization: "jeon"). Yang is a former Korean currency. It is a cognate of the Chinese tael (pronounced "liǎng" in Chinese). The yang was subdivided into 100 fun (pronounced "pun" but spelt with an "f" on the coins). Fun (푼) is a cognate of the Chinese word fen (分 fēn), referring to
Word metric But the word which expresses -3 most efficiently is -1-1-1, a word of length 3. The distance between 0 and -3 in the word metric is therefore equal to 3. More generally, the distance between two integers m and n in the word metric is equal to |m-n|, because the shortest word representing the difference m-n has length equal to |m-n|. For a more illustrative example, the elements of the group formula_12 can be thought of as vectors in the Cartesian plane with integer coefficients. The group formula_12 is generated by the standard unit vectors formula_14, formula_15 and their inverses