find an isomorphism from from the group of integers under addition to the group of even integers under addition.(adsbygoogle = window.adsbygoogle || []).push({});

I know, very simple question, but I dont know what Im doing here......

the hint in the book says to try n to 2n. I thought of that too, since it specificaly says integers to even integers.

the books says to prove injective, surjective, and phi(x,y) = phi(x) phi(y).

so what do I do? start x = 2y and prove x = y?

I think i'm wronng...

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# Homework Help: Finding isomorphism

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