出典:Wiktionary
出典:『Wiktionary』 (2017/03/19 20:39 UTC 版)
quasigroup (複数形 quasigroups)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/30 15:57 UTC 版)
In mathematics, especially in abstract algebra, a quasigroup is an algebraic structure resembling a group in the sense that "division" is always possible. Quasigroups differ from groups mainly in that they need not be associative. A quasigroup with an identity element is called a loop.