Contemporary Abstract Algebra
Contemporary Abstract Algebra
9th Edition
ISBN: 9781305657960
Author: Joseph Gallian
Publisher: Cengage Learning
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Chapter 5, Problem 1E

Let α [ 1 2 3 4 5 6 2 1 3 5 4 6 ] and β = [ 1 2 3 4 5 6 6 1 2 4 3 5 ] .

Compute each of the following.

a. α 1

b. β α

c. α β

a.

Expert Solution
Check Mark
To determine

To compute α1 ,where α=( 1 2 3 4 5 6 2 1 3 5 4 6 )β=( 1 2 3 4 5 6 6 1 2 4 3 5 )

Answer to Problem 1E

  α1=( 1 2 3 4 5 6 2 1 3 5 4 6 )

Explanation of Solution

Given:

  α=( 1 2 3 4 5 6 2 1 3 5 4 6 )β=( 1 2 3 4 5 6 6 1 2 4 3 5 ) .

Concept Used:

  Ifα=( a 1 a 2 a 3 b 1 b 2 b 3 )thenα1=( b 1 b 2 b 3 a 1 a 2 a 3 )

Calculation:

Use the above concept to find α1 .

  α=( 1 2 3 4 5 6 2 1 3 5 4 6 )α1=( 1 2 3 4 5 6 2 1 3 5 4 6 ) .

Conclusion:

Thus, α1=( 1 2 3 4 5 6 2 1 3 5 4 6 )

b.

Expert Solution
Check Mark
To determine

To compute αβ ,where α=( 1 2 3 4 5 6 2 1 3 5 4 6 )β=( 1 2 3 4 5 6 6 1 2 4 3 5 )

Answer to Problem 1E

  βα=( 1 2 3 4 5 6 1 6 2 3 4 5 ) .

Explanation of Solution

Given:

  α=( 1 2 3 4 5 6 2 1 3 5 4 6 )β=( 1 2 3 4 5 6 6 1 2 4 3 5 )

Concept Used:

  Ifα=( a 1 a 2 a 3 b 1 b 2 b 3 )andβ=( b 1 b 2 b 3 a 1 a 2 a 3 )thenαβ=( a 1 a 2 a 3 a 1 a 2 a 3 )

Calculation:

  βα=( 1 2 3 4 5 6 6 1 2 4 3 5 )( 1 2 3 4 5 6 2 1 3 5 4 6 )βα=( 1 2 3 4 5 6 1 6 2 3 4 5 )

Conclusion:

Thus, βα=( 1 2 3 4 5 6 1 6 2 3 4 5 )

c.

Expert Solution
Check Mark
To determine

To compute αβ ,where α=( 1 2 3 4 5 6 2 1 3 5 4 6 )β=( 1 2 3 4 5 6 6 1 2 4 3 5 )

Answer to Problem 1E

  αβ=( 1 2 3 4 5 6 6 2 1 5 3 4 )

Explanation of Solution

Given:

  α=( 1 2 3 4 5 6 2 1 3 5 4 6 )β=( 1 2 3 4 5 6 6 1 2 4 3 5 )

Concept Used:

  Ifα=( a 1 a 2 a 3 b 1 b 2 b 3 )andβ=( b 1 b 2 b 3 a 1 a 2 a 3 )thenαβ=( a 1 a 2 a 3 a 1 a 2 a 3 )

Calculation:

  αβ=( 1 2 3 4 5 6 2 1 3 5 4 6 )( 1 2 3 4 5 6 6 1 2 4 3 5 )=( 1 2 3 4 5 6 6 2 1 5 3 4 )

Conclusion:

Thus, αβ=( 1 2 3 4 5 6 6 2 1 5 3 4 )

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Chapter 5 Solutions

Contemporary Abstract Algebra

Ch. 5 - Find an element in A12 of order 30.Ch. 5 - Show that a function from a finite set S to itself...Ch. 5 - Prob. 13ECh. 5 - Suppose that is a 6-cycle and is a 5-cycle....Ch. 5 - Prob. 15ECh. 5 - If is even, prove that 1 is even. If is odd,...Ch. 5 - Prob. 17ECh. 5 - In Sn , let be an r-cycle, an s-cycle, and a...Ch. 5 - Let and belong to Sn . Prove that is even if...Ch. 5 - Associate an even permutation with the number +1...Ch. 5 - Complete the following statement: A product of...Ch. 5 - What cycle is (a1a2an)1 ?Ch. 5 - Show that if H is a subgroup of Sn , then either...Ch. 5 - Suppose that H is a subgroup of Sn of odd order....Ch. 5 - Give two reasons why the set of odd permutations...Ch. 5 - Let and belong to Sn . Prove that 11 is an...Ch. 5 - Prob. 27ECh. 5 - How many elements of order 5 are in S7 ?Ch. 5 - Prob. 29ECh. 5 - Prove that (1234) is not the product of 3-cycles....Ch. 5 - Let S7 and suppose 4=(2143567) . Find . What are...Ch. 5 - My mind rebels at stagnation. Give me problems,...Ch. 5 - Let (a1a2a3a4)and(a5a6) be disjoint cycles in S10...Ch. 5 - If and are distinct 2-cycles, what are the...Ch. 5 - Prob. 35ECh. 5 - Let =(1,3,5,7,9,8,6)(2,4,10) . What is the...Ch. 5 - Prob. 37ECh. 5 - Let H=S5(1)=1and(3)=3 . Prove that H is a...Ch. 5 - In S4 , find a cyclic subgroup of order 4 and a...Ch. 5 - In S3 , find elements and such that...Ch. 5 - Find group elements and in S5 such that...Ch. 5 - Represent the symmetry group of an equilateral...Ch. 5 - Prove that Sn is non-Abelian for all n3 .Ch. 5 - Prove that An is non-Abelian for all n4 .Ch. 5 - For n3 , let H=bSn(1)=1 or 2 and (2)=1or2 .Prove...Ch. 5 - Show that in S7 , the equation x2=(1234) has no...Ch. 5 - If (ab) and (cd) are distinct 2-cycles in Sn ,...Ch. 5 - Let and belong to Sn . Prove that 1 and are...Ch. 5 - Viewing the members of D4 as a group of...Ch. 5 - Viewing the members of D5 as a group of...Ch. 5 - Prob. 51ECh. 5 - Prob. 52ECh. 5 - Show that A5 has 24 elements of order 5, 20...Ch. 5 - Find a cyclic subgroup of A8 that has order 4....Ch. 5 - Prob. 55ECh. 5 - Prob. 56ECh. 5 - Show that every element in An for n3 can be...Ch. 5 - Show that for n3,Z(Sn)=[] .Ch. 5 - Prob. 59ECh. 5 - Use the Verhoeff check-digit scheme based on D5 to...Ch. 5 - Prob. 61ECh. 5 - (Indiana College Mathematics Competition) A...Ch. 5 - Prob. 63ECh. 5 - Find five subgroups of S5 of order 24.Ch. 5 - Why does the fact that the orders of the elements...Ch. 5 - Let a belong to Sn . Prove that divides n!Ch. 5 - Encrypt the message ATTACK POSTPONED using the...Ch. 5 - The message VAADENWCNHREDEYA was encrypted using...
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