Ring Isomorphism2

The Boolean ring of subsets is isomorphic to the ring of characteristic functions
Solution to Abstract Algebra by Dummit & Foote 3rd edition Chapter 7.3 Exercise 7.3.15 Solution:...
2Z and 3Z are not isomorphic as rings
Solution to Abstract Algebra by Dummit & Foote 3rd edition Chapter 7.3 Exercise 7.3.1 Prove that...