Group Theory, Lec.- 39( Normal Subgroups), by Dr.D.N.Garain, for B.Sc/M.Sc(Maths.)

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#Normal_Subgroups,
This lecture contains a Lecture with Lecture Notes on Normal Subgroups. It has been proved that if the Index of a subgroup is two then it is a Normal subgroup. Centre if a group is a Normal Subgroup. An alternative form of definition of a Normal subgroup has been given.
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