If A is a Z-module, does this imply that A and Hom(A,Q/Z) are isomorphic ?
2026-04-04 07:28:03.1775287683
Are A and Hom(A,Q/Z) isomorphic?
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Take $A=\mathbf Z$. Are $\mathbf Z$ and $\mathbf Q/\mathbf Z$ isomorphic?