P-Regular Nearrings Characterized by Their Bi-ideals

Abstract

Using the idea of quasi-ideals of $P$-regular nearrings, the concept of bi-ideals of $P$-regular nearrings is generalized, which is an extension of the concept of quasi-ideals of $P$-regular nearrings and some interesting characterizations of bi-ideals are obtained. As a result, we prove that every element of a bi-ideal $B$ of a $P$-regular nearring can be represented as the sum of two elements of $P$ and $Q$. Moreover, every element of the finite intersection $\bigcap _{i=1}^n{B}_i$ of bi-ideals of a $P$-regular distributive nearring $N$ can be represented as the sum of two elements of $P$ and $B_{1}N{B}_{2}N...N{B}_{n-1}N{B}_n$.

8 pages