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单词 ProofThatAllCyclicGroupsAreAbelian
释义

proof that all cyclic groups are abelian


The following is a proof that all cyclic groups are abelian.

Proof.

Let G be a cyclic groupMathworldPlanetmath and g be a generatorPlanetmathPlanetmathPlanetmath of G. Let a,bG. Then there exist x,y such that a=gx and b=gy. Since ab=gxgy=gx+y=gy+x=gygx=ba, it follows that G is abelianMathworldPlanetmath.∎

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