- It is interesting to know that if N is normal subgroup of a group G, then the group N, G and G/N are related and if we know enough information about two of these groups, we can determine useful information about the third.
- I didn't really understand when it says that G/N denotes the set of all right cosets of N in G, is it true that it is also the set of all left cosets of N in G?
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