What is special about the divisors of 12?
Commutative Algebra
2012-12-17 v1
Abstract
Let R be the ring of polynomials in finitely many commuting variables with coefficients in Z_n. It is shown that every unit of R is an involution if and only of n is a divisor of 12.
Keywords
Cite
@article{arxiv.1212.3347,
title = {What is special about the divisors of 12?},
author = {Sunil K. Chebolu and Michael Mayers},
journal= {arXiv preprint arXiv:1212.3347},
year = {2012}
}
Comments
3 pages, to appear in Math. Magazine