English December 26 Cited by user Cynitizen on 06 Dec 2023 * 887 – Berengar I is elected as king of Italy by the lords of Lombardy. He is crowned with the Iron Crown of Lombardy at Pavia.
English Octonion Cited by user Ecangola on 25 Oct 2023 {{Infobox number system * official_name = Octonions * symbol = . Octonions have eight dimensions; twice the number of dimensions of the quaternions, of which they are an…
Japanese 多元数 Cited by user FlatLanguage on 18 Sep 2023 数学における多元数(たげんすう、; 超複素数)は、実数体上の単位的多元環の元を表す歴史的な用語である. 多元数の研究は19世紀後半に現代的な群の表現論の基盤となった.