Question 1. Show that in S7, the equation x2 (1234) has no solutions. Question 2. Let n be an even positive integer. Prove that An has an element of order greater than n if and only if n > 8. Question 3. Notice that the set {1, –1} is a group under multiplication. Fix n > 2. Define p : Sn → {1, –1} via - if o is an even permutation e(0) = -1 if o is an odd permutation Prove that y is a group homomorphism. Also compute ker y. Question 4. Let G be a group. Define f : G → G via g → g1. (a) Prove that f is a bijection. (b) Prove that ƒ is a homomorphism if and only if G is Abelain. Question 5. Suppose G is an Abelain group, |G| = given by x + æ² is an isomorphism. n <0, and |g| # 2 for all g E G. Prove that the map ¢: G → G
Question 1. Show that in S7, the equation x2 (1234) has no solutions. Question 2. Let n be an even positive integer. Prove that An has an element of order greater than n if and only if n > 8. Question 3. Notice that the set {1, –1} is a group under multiplication. Fix n > 2. Define p : Sn → {1, –1} via - if o is an even permutation e(0) = -1 if o is an odd permutation Prove that y is a group homomorphism. Also compute ker y. Question 4. Let G be a group. Define f : G → G via g → g1. (a) Prove that f is a bijection. (b) Prove that ƒ is a homomorphism if and only if G is Abelain. Question 5. Suppose G is an Abelain group, |G| = given by x + æ² is an isomorphism. n <0, and |g| # 2 for all g E G. Prove that the map ¢: G → G
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter4: More On Groups
Section4.4: Cosets Of A Subgroup
Problem 3E: In Exercises 3 and 4, let G be the octic group D4=e,,2,3,,,, in Example 12 of section 4.1, with its...
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