類るい群ぐん

noun

class group

Technical term in mathematics, specifically in algebraic number theory and related fields. Refers to the group of ideal classes of a number field or Dedekind domain.

• 代だい数すう体たいの類るい群ぐんは有ゆう限げんアーベル群ぐんである。

  The class group of an algebraic number field is a finite abelian group.