# Category:Principal Ideals

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This category contains results about **Principal Ideals**.

Let $\struct {R, +, \circ}$ be a ring with unity.

Let $a \in R$.

We define:

- $\ideal a = \ds \set {\sum_{i \mathop = 1}^n r_i \circ a \circ s_i: n \in \N, r_i, s_i \in R}$

The ideal $\ideal a$ is called the **principal ideal of $R$ generated by $a$**.

## Subcategories

This category has the following 2 subcategories, out of 2 total.

## Pages in category "Principal Ideals"

The following 8 pages are in this category, out of 8 total.