Is <(12)> a Maximal Subgroup of S_{3}?

In summary, a maximal subgroup of a group is a subgroup that cannot be properly contained in any larger subgroup. It is not necessarily a normal subgroup and a group can have multiple distinct maximal subgroups. A subgroup can be determined to be maximal by checking if it is not contained in any larger subgroup of the group. Maximal subgroups are not unique for a given group.
  • #1
moont14263
40
0
If G is a finite group and M is a maximal subgroup, H is a subgroup of G not contained in M. Then G=HM.

Is this true?
 
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  • #2
No. Can you find a counterexample?
 
  • #3
I tried, but I failed. Thanks.
 
  • #4
What could go wrong??
 
  • #5
S_{3}, <(12)> maximal, <(23)>, S_{3} not equal <(12)><(23)>
Thank you very much.
 

1. What is a maximal subgroup?

A maximal subgroup of a group is a subgroup that cannot be properly contained in any larger subgroup.

2. How is a maximal subgroup different from a normal subgroup?

A maximal subgroup is not necessarily a normal subgroup, meaning it may not be invariant under conjugation by elements of the larger group.

3. Can a group have more than one maximal subgroup?

Yes, a group can have multiple maximal subgroups, but they will all be distinct from each other.

4. How can we determine if a subgroup is maximal?

A subgroup can be determined to be maximal by checking if it is not contained in any larger subgroup of the group.

5. Are maximal subgroups unique for a given group?

No, there could be multiple different maximal subgroups for a given group, depending on the structure and properties of the group.

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