...When a group's operations are commutative (multiplication ab = ba , addition a + b = b + a for all two elements a and b ), the group is said to be a commutative group or an Abelian group. When N. H. Abel studied algebraically solvable equations, he dealt with the extension of the Galois group to a commutative group, hence the name. ... *Some of the terminology that refers to the "Abelian group" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…群において,その演算が可換(乗法ならばab=ba,加法ならばa+b=b+aが,すべての2元a,bについて成立)であるとき,その群は可換群またはアーベル群Abelian groupであるという。N.H.アーベルが代数的に解ける方程式について研究した際に,ガロア群が可換群になるような拡大が扱われたので,この名があるという。… ※「Abelian group」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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