Given a subgroup , consider the set .

Prove that is normal if and only if .

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- March 2nd 2011, 07:24 PMJJMC89Given a subgroup A in G, consider the normalizer. Prove A is normal iff normalizer=G.
Given a subgroup , consider the set .

Prove that is normal if and only if . - March 2nd 2011, 07:32 PMDrexel28
- March 2nd 2011, 07:36 PMJJMC89
- March 2nd 2011, 07:54 PMDrexel28
- March 2nd 2011, 08:01 PMJJMC89