User blog comment:Hyp cos/tree function and TREE(3)/@comment-5150073-20140624084600/@comment-5150073-20140624120026

Hyp cos, these operations are made-up by you. Friedman didn't mention that, so probably you're trying to bound another function.

Peng, as you always note, the term "natural" is quite subjective. There is no reason why linear BEAF is less natural than Hollom's linear Hyperfactorial array notation.