Problem 4. Let G = A4. (1) List all of subgroups of G with order 2 or 3. (2) Explain why G has no subgroup of order 6. (3) Find the subgroup H of order 4.
Problem 4. Let G = A4. (1) List all of subgroups of G with order 2 or 3. (2) Explain why G has no subgroup of order 6. (3) Find the subgroup H of order 4.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Problem 4. Let G = A4.
(1) List all of subgroups of G with order 2 or 3.
(2) Explain why G has no subgroup of order 6.
(3) Find the subgroup H of order 4.
(4) List all left cosets of H in G.
Expert Solution
Step 1
G = A4 = { I , (123) , (132) , (124) , (142), (134) , (143) , (234) , (243) , (12)(34) , (13)(24) , (23)(14) }
(1). Subgroup of order 2:
- H1= { I , (12)(34) }
- H2= { I , (13)(24) }
- H3= { I , (23)(14) }
Subgroup of order 3:
- H1= { I , (123) , (132) }
- H2= { I , (124) , (142) }
- H3= { I , ( 134) , (143) }
- H4= { I , ( 234) , (243) }
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