Draw up an addition and a multiplication table for the factor ring 2Z/8Z.What known ring is 2Z/8Z isomorphic
to?
If is an isomorphism of commutative rings and is an ideal of then is an ideal of and furthermore . Define by . This is an isomorphism. Let , this is an ideal of . Note that . Thus, .Draw up an addition and a multiplication table for the factor ring 2
Z/8Z.What known ring is 2Z/8Z isomorphic to