1. why is a monomorphism being an one to one mapping would maps from a small field to a large field? (K to L) (p.50)
2. so far it seems like in finding Q(X), we only need to try out the possibilities in multiplying some elements to X to get all the possible forms that it generate. Are there examples where we need to look at the inverse also to include all the possible forms the X could generate?
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