User blog comment:DrCeasium/Continued hyperfactorial array notation/@comment-5150073-20130327205450/@comment-25418284-20130327221730

BEAF is the only googological notation* that has really gotten very far, however. I am very interested in seeing DrCeasium's approach in reaching \(\Gamma_0\)-space and beyond.

*A googological notation is a recursive function that maps finite arrays of integers indexed by recursive ordinals to large positive integers. BEAF, chained arrows, and xE# are all examples.