Prove that if G is a group and let N be a normal subgroup of G. Then the set of all cosets of N in G is a group under the operation of multiplication. The identity element of this group is N itself and the inverse of a coset xN is the coset x^-1N for any element x of G.

Question

perl · Answer

what do you have so far?

anonymous · Answer

nothing am confused

perl · Answer

do you know the definition of coset

perl · Answer

ok do you have an online book or notes

perl · Answer

what is the definition of a normal subgroup?