a. Show that an intersection of subrings of a ring R is again a subring of R.
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a. Show that an intersection of subrings of a ring R is again a subring of R.
b. Show that an intersection of subfields of a field F is again a subfield of F.
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a Let R be a ring and let H i R for i I Theorem 74 shows that H iI H i is an additive group Let a b ...View the full answer
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