Let denote an -algebra, so that is a Vector Space over and
See also Abelian Group, Commutative
References
Cox, D.; Little, J.; and O'Shea, D. Ideals, Varieties, and Algorithms: An Introduction to
Algebraic Geometry and Commutative Algebra, 2nd ed. New York: Springer-Verlag, 1996.
Finch, S. ``Zero Structures in Real Algebras.''
http://www.mathsoft.com/asolve/zerodiv/zerodiv.html.
MacDonald, I. G. and Atiyah, M. F. Introduction to Commutative Algebra. Reading, MA: Addison-Wesley, 1969.
Samuel, P. and Zariski, O. Commutative Algebra, Vol. 2. New York: Springer-Verlag, 1997.