Aarex Tiaokhiao (born October 12, 2001[dead link]) is a young American googologist. The name is believed to be a pseudonym. He developed some extensions of the known notations and published them on his own site.
Tiaokhiao invented the Aarex function, which he claims to be the fastest growing function ever.[dead link] The function is a naive extension of Adam Goucher's xi function, and Rayo's function easily surpasses it.
Aarex has three accounts on Googology Wiki: Aarex Tiaokhiao (joined October 16, 2010, merged to Googleaarex account), Googleaarex (current account, joined April 18, 2012), and AarexWikia04 (joined July 12, 2016, currently disabled).
From 2016 and onwards, Aarex made Windows Never Released versions YouTube videos & worked on googology less than he did earlier. But in March 2019, Aarex quit WNR, and is currently inactive on YouTube. It is possible he may return to being a full-fledged googologist in the upcoming months.