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Math Help - give an example of non-normal subgroup of a group

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    give an example of non-normal subgroup of a group

    Give an example of a subgroup of a group that is not normal
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    Quote Originally Posted by szpengchao View Post
    Give an example of a subgroup of a group that is not normal
    Any subgroup of S_5 which is not \{ e\}, A_5, S_5 would not be normal. This provides a lot of examples.
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