Back to Ring Homomorphisms and Isomorphisms

Problem 3

Avg difficulty 3.0

Show $\mathbb{Z}^{2}\not\cong\mathbb{Q}$ .

Kan, A Complete Introduction to Abstract Algebra, Rings, Ring Homomorphisms and Isomorphisms, Problem 3

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Adapted from A Complete Introduction to Abstract Algebra © 2022–2026 Kan Onn Kit. Licensed under CC BY-SA 4.0. Source: A Complete Introduction to Abstract Algebra. Imported at revision a559e8b.