Proving G is Solvable or Finding a Counter-Example

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SUMMARY

The discussion centers on proving whether a group G with a solvable maximal normal subgroup is itself solvable or identifying a counter-example. The user identifies the symmetric group S_5, which is not solvable, and its unique proper normal subgroup A_5, also not solvable, as a potential counter-example but concludes it does not satisfy the conditions. The user also mentions the solvability of the quaternion and dihedral groups, questioning if a direct product of a solvable group with another suitable group could yield a counter-example.

PREREQUISITES
  • Understanding of group theory concepts, particularly solvable groups.
  • Familiarity with the symmetric group S_5 and its properties.
  • Knowledge of normal subgroups and their significance in group theory.
  • Basic comprehension of direct products of groups.
NEXT STEPS
  • Research the properties of the symmetric group S_5 and its normal subgroups.
  • Explore the characteristics of solvable groups and their classifications.
  • Investigate counter-examples in group theory, focusing on groups with solvable maximal normal subgroups.
  • Learn about direct products of groups and their implications for solvability.
USEFUL FOR

This discussion is beneficial for students of abstract algebra, particularly those studying group theory, as well as educators and researchers seeking to understand the complexities of solvability in groups.

burritoloco
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Homework Statement


Suppose G has a solvable maximal normal subgroup. Either prove G is solvable, or give a counter-example.


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The Attempt at a Solution


We have that G/H is simple, not necessarily abelian, so my guess is there could be a counter-example. However, I'm not sure what it is.
I know the symmetric group S_5 is not solvable and it has the unique proper normal subgroup A_5, but A_5 is not solvable, so this doesn't work as a counter.
Moreover, the quaternion group, dihedral groups are solvable too. Any help please?
My exam is tomorrow... Thanks for the help!
 
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What if G is the direct product of a solvable group with something suitable? Can this give you a counterexample?
 

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