# 阿貝爾群(Abelian group) > Author: Junner > Date: 2/17/2025 Abelian group 又稱為交換群(commutative group),簡單來說,此群的任意元素對於二元運算 $\star$ 有交換率。 對所有 $a, b \in G$ 及二元運算 $\star$ 有 $a\star b = b\star a$,則此群記為 $(G, \star)$。
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