Remove ads
来自维基百科,自由的百科全书
如果由任意元素所產生的次代數符合結合律,這個代數就是擁有冪結合性。元素x能夠多次自乘並不在乎到達了什麼冪數。例如x(x(xx)) = (x(xx))x = (xx)(xx). 以下結合律方式更為強烈:
代數中每個x,
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.