1) In the example at the bottom of pg. 140, there is an example that talks about the cosets of I. I'm so sorry but what does it mean to be a coset of I? It also talks about the multiplication of cosets on pg. 146, and I just wish I understood better what exactly a coset is.
2) It is interesting now to see these al relate to homomorphisms that we talked about before, and also how they differ.
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