+The **Ackermann function** is a foundational example in [computability](/wiki/computability), famed for its exceptionally rapid growth. Defined through nested [recursion](/wiki/recursion), it transcends the class of primitive recursive functions, showcasing the bounds of simple definable computation.
+## See also
+- [Recursive Function](/wiki/recursive_function)
+- [Growth Rates](/wiki/growth_rates)
+- [Computational Complexity](/wiki/computational_complexity)
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