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seen Oct 9 '12 at 4:08

Oct
9
awarded  Scholar
Oct
9
accepted cosets aren't forming a partition?
Oct
9
comment cosets aren't forming a partition?
I got confused because the two cosets don't contain the same elements. $(1,0)$ is not in $(1,2)+H$, but is in $(1,1)+H$.
Oct
9
awarded  Student
Oct
9
asked cosets aren't forming a partition?