Fork me on GitHub
Math for the people, by the people.

User login

prime ring

\documentclass{article}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{graphicx}
%%%%\usepackage{xypic}
\begin{document}
A ring $R$ is said to be a \emph{prime ring} if the zero ideal is a prime ideal.

If a prime ring $R$ is commutative, then it is a cancellation ring.  If in \PMlinkescapetext{addition} $R$ has a multiplicative identity $1 \neq 0$, then it is an integral domain.
%%%%%
%%%%%
%%%%%
%%%%%
nd{document}