- Any additive subgroup of a rng of square zero is an simple if and only if its additive group is a simple abelian group, i . e ., a cyclic group of prime order.
- For example, the ring with \ Q as additive group and trivial multiplication ( i . e . a b = 0 for all a, b ) has no maximal ideal ( and of course no 1 ) : Its ideals are precisely the additive subgroups.
- It's difficult to find additive subgroup in a sentence. 用additive subgroup造句挺難的