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Rationals

Name: Anonymous 2008-07-06 16:12

Prove that any finite multiplicative group of the rationals is cyclic.

I did it a while ago, and I can't remember how.

Name: Anonymous 2008-07-09 12:06

>>2
I forgot to use "subgroup", not group.

>>3
You're right, we should state we're considering commutative algebras.

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