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A comment on Ask HN: Are we using the final numeral system?. Parent comment

Re:Ask HN: Are we using the final numeral system? by pmelendez on Saturday May 24, 2014 @09:32PM (#7795115)
I thought Knuth's up-arrow notation was actually an operator rather than a numeral system. Just in the same way that multiplication is a short for sums, the arrow operator would be a short for exponentiation.
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