+A **principal ideal** is a special kind of [Ideal](/wiki/ideal) in [Ring theory](/wiki/ring_theory), uniquely generated by just one element. It represents all multiples of that generating element within the ring, forming a fundamental building block for understanding ring structures.
+## See also
+- [Ring](/wiki/ring)
+- [Ideal](/wiki/ideal)
+- [Generator](/wiki/generator)
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