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- $I = (r)$, where $(r)$ is the set of multiples of $r$ in $R$.
In this case, we say that $I$ is the principal ideal generated by $r$.
This definition logically relies on the following definitions and statements: Def/Ideal
The following statements and definitions logically rely on the material of this page: Def/PID, and State/Divisibility corresponds to containment of principal ideals
To visualize the logical connections between this definition and other items of mathematical knowledge, you can visit any of the following clusters, and click the "Visualize" tab: Clust/Basic ring theory