1. I think I am getting confused between left cosets as presented in 6.1 denoted a+I, and left cosets as presented in this section denoted a+K. Is the only difference that I is a subring and K is a subgroup?
2. It appears that a normal subgroup N of G is similar to abelian (commutative) groups as talked about before, except now we are talking about the commutativity(?) of cosets. So Na=aN for all a in G.
No comments:
Post a Comment