+A normal subgroup is a special [Subgroup](/wiki/subgroup) within a larger [Group](/wiki/group). Its elements remain invariant under inner automorphisms, enabling the elegant formation of new group structures fundamental to abstract algebra.
+## See also
+- [Quotient Group](/wiki/quotient_group)
+- [Homomorphism](/wiki/homomorphism)
+- [Kernel](/wiki/kernel)
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