Problem 4. A group G is called cyclic if G = (g) for some g = G. 4.1. Suppose that G and H are two groups, and that : G → H is an isomorphism. Prove that the group G is cyclic if and only if H is cyclic.¹ 4.2. In each of the following, prove that the two given groups are not isomorphic: a) Z/16Z and D8. b) Z/2ZZ/2Z × Z/2Z and Z/3Z × Z/2Z.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter4: More On Groups
Section4.6: Quotient Groups
Problem 27E: 27. a. Show that a cyclic group of order has a cyclic group of order as a homomorphic image. ...
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Problem 4. A group G is called cyclic if G = (g) for some g = G.
4.1. Suppose that G and H are two groups, and that : G → H is an isomorphism.
Prove that the group G is cyclic if and only if H is cyclic.¹
4.2. In each of the following, prove that the two given groups are not isomorphic:
a) Z/16Z and D8.
b) Z/2ZZ/2Z × Z/2Z and Z/3Z × Z/2Z.
Transcribed Image Text:Problem 4. A group G is called cyclic if G = (g) for some g = G. 4.1. Suppose that G and H are two groups, and that : G → H is an isomorphism. Prove that the group G is cyclic if and only if H is cyclic.¹ 4.2. In each of the following, prove that the two given groups are not isomorphic: a) Z/16Z and D8. b) Z/2ZZ/2Z × Z/2Z and Z/3Z × Z/2Z.
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