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 Nov28 suggested approved edit on Can every proof by contradiction also be shown without contradiction? Nov26 comment Notation for n-ary exponentiation Nothing like that seems to work for left-associative tetration, so I have updated the question to include both right- and left-associative tetration operators. The arrow below the $4$ indicates the direction of associativity. Nov26 revised Notation for n-ary exponentiation added 388 characters in body Nov26 revised Notation for n-ary exponentiation added 6 characters in body Nov26 awarded Tag Editor Nov26 revised hyperoperation wiki excerpt added 161 characters in body Nov26 wiki created hyperoperation excerpt Nov26 suggested approved edit on hyperoperation tag wiki excerpt Nov26 comment Notation for n-ary exponentiation @rayradjr Since $((({x_1}^{x_2})^{\cdots})^{x_{n-1}})^{x_n} = x_1 \text{^}\Big(\prod\limits_{i=2}^{n} x_i \Big)$, we do not need a symbol for left-associative exponentiation. However, nothing like this would work for right-associative exponentiation, hence the question about notation. Nov26 comment Notation for n-ary exponentiation I think I finally figured out how to get them to look more like accumulation symbols, but they are higher than sum and product symbols. Nov26 revised Notation for n-ary exponentiation added 304 characters in body Nov26 comment Notation for n-ary exponentiation @DanBrumleve Interesting thought. I picked $\text{E}$ for exponent and $4$ for tetration, but it wouldn't render them as accumulation symbols (which is why they are inside product symbols). This way $5$ would work for pentation, etc. Nov26 revised Limit of an n-ary product added 2 characters in body Nov26 accepted Limit of an n-ary product Nov25 revised Notation for n-ary exponentiation edited tags Nov24 asked Notation for n-ary exponentiation Nov24 answered Limit of an n-ary product Nov24 reviewed Reviewed Describing all $\rho$-invariant inner products Nov24 reviewed Reviewed example of area preserving twist maps Nov24 awarded Analytical