Let : G G' be a group homomorphism, and let N' be a normal subgroup

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Let ∅ : G → G' be a group homomorphism, and let N' be a normal subgroup of G'. Show that ∅^-1 [N'] is a normal subgroup of G.

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A First Course In Abstract Algebra

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7th Edition

Authors: John Fraleigh

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Let : G G' be a group homomorphism, and let N' be a normal subgroup

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A First Course In Abstract Algebra

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