+**Knuth's Up-Arrow Notation** is a system devised by [Donald Knuth](/wiki/Donald_Knuth) for writing extremely large numbers concisely. It generalizes [exponentiation](/wiki/Exponentiation) into a sequence of hyperoperations, where each added up-arrow represents a higher iteration of the previous operation, elegantly taming numbers of astronomical scale.
+## See also
+- [Hyperoperation](/wiki/Hyperoperation)
+- [Graham's Number](/wiki/Grahams_Number)
+- [Large Numbers](/wiki/Large_Numbers)
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