Sunday, August 6, 2017

reference request - Looking for a proof that finite abelian groups are realizable over $mathbb{Q}$.



I've seen it claimed in a few places that all finite abelian groups are realizable over $\mathbb{Q}$, but I'm as yet unable to find a proof of this written down. Would it be possible for someone to point me towards a book that gives this result?


Answer



It's theorem 5.1 in Inverse Galois Theory by Malle and Matzat.


No comments:

Post a Comment

analysis - Injection, making bijection

I have injection $f \colon A \rightarrow B$ and I want to get bijection. Can I just resting codomain to $f(A)$? I know that every function i...