4. Suppose (G₁, *) and (G₂, 0) are groups, let i and J denote the respective identities of G₁ and G2, let : G₁ G₂ be a group isomorphism, and suppose z E G₁. (a) Prove that if a has finite order, then (r) has finite order and ord(a) = ord (y(x)). Hint: to prove that ord(a) = ord ((r)), consider the two cases x = 1 and 1. For the second case, note that ord(x) > 1 and apply the second assertion of the Corollary to Proposition 1.3.3. Proof: (b) Prove that if x has infinite order, then (r) has infinite order. Hint: use the fourth assertion of the Corollary to Proposition 1.3.3.
4. Suppose (G₁, *) and (G₂, 0) are groups, let i and J denote the respective identities of G₁ and G2, let : G₁ G₂ be a group isomorphism, and suppose z E G₁. (a) Prove that if a has finite order, then (r) has finite order and ord(a) = ord (y(x)). Hint: to prove that ord(a) = ord ((r)), consider the two cases x = 1 and 1. For the second case, note that ord(x) > 1 and apply the second assertion of the Corollary to Proposition 1.3.3. Proof: (b) Prove that if x has infinite order, then (r) has infinite order. Hint: use the fourth assertion of the Corollary to Proposition 1.3.3.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter3: Groups
Section3.6: Homomorphisms
Problem 17E: 17. Find two groups and such that is a homomorphic image of but is not a homomorphic image of ....
Related questions
Question
Dear expert don't Use chat gpt
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 4 steps with 33 images
Recommended textbooks for you
Elements Of Modern Algebra
Algebra
ISBN:
9781285463230
Author:
Gilbert, Linda, Jimmie
Publisher:
Cengage Learning,
Linear Algebra: A Modern Introduction
Algebra
ISBN:
9781285463247
Author:
David Poole
Publisher:
Cengage Learning
Elements Of Modern Algebra
Algebra
ISBN:
9781285463230
Author:
Gilbert, Linda, Jimmie
Publisher:
Cengage Learning,
Linear Algebra: A Modern Introduction
Algebra
ISBN:
9781285463247
Author:
David Poole
Publisher:
Cengage Learning