Rings with finitely many zero divisors
arXiv:2604.23423
Abstract
We give an elementary proof of a result which is not as well known as it should be: a ring with a specified finite number of zero divisors is finite, with a precise bound on its order.
2 page note intended for the MAA Monthly or Math. Mag. or some such journal; v.2 fixed typos in Lemma 1 proof