Aarex Tiaokhiao (born October 12, 2001) is a young American googologist. He developed some extensions of the known notations and published them on his own site. Tiaokhiao invented the Arx(n) function, which he claims to be the fastest growing function ever. The function is a naive extension of Adam Goucher's xi function, and Rayo's function easily surpasses it. The name is believed to be a pseudonym.