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
Group of rational points on the unit circle to the origin, equal to 0. The identity in this larger group is (1,0,1,0), and the group operation is formula_9 For the group on the unit circle, the appropriate subgroup is points of form ("w","x",1,0), with formula_10 and its identity element is (1,0,1,0). The unit hyperbola group corresponds to points of form (1,0,"y","z"), with formula_11 and the identity is again (1,0,1,0). (Of course, since they are subgroups of the larger group, they both must have the same identity element.) Group of rational points on the unit circle In mathematics, the rational points on the unit circle are those points ("x",