Proposition: Principal Ideals being Maximal Ideals

Let $(R, + ,\cdot)$ be an integral domain, $a\in R$ with $a\neq 0.$ A principal ideal $(a)\lhd R$ is a maximal ideal among all principal ideals, if and only if $a$ is irreducible in $R.$

This holds especially, if $R$ is a principal ideal ring.

Proofs: 1


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References

Bibliography

  1. Modler, Florian; Kreh, Martin: "Tutorium Algebra", Springer Spektrum, 2013