= Knuth's up-arrow notation
{wiki=Knuth's_up-arrow_notation}
Knuth's up-arrow notation is a way to represent very large numbers, especially those that arise in combinatorial mathematics and computer science. It was developed by Donald Knuth in 1976 as a method to describe exponential towers and hyperoperations. The basic idea revolves around using arrows to denote repeated operations. Let's break it down: 1. **Single Arrow**: The notation \\( a \\uparrow b \\) is equivalent to \\( a^b \\) (i.e.
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