Harvey Friedman

Harvey Friedman in 2011.

Harvey Friedman (born September 23, 1948) is a mathematical logician who taught at the Ohio State University until his retirement in the summer of 2012.

Since 1997, Friedman has been continuing a series of posts to New York University's FOM (Foundations of Mathematics) mailing list which he calls the "numbered posts." They cover a wide range of topics in mathematical logic, and some of the research involves large numbers. For example, he created and proved the block subsequence theorem, circle theorem, the TREE sequence, the subcubic graph numbers, transcendental integers and finite promise games.

Friedman is also a self-taught amateur pianist.

See also

Googology by Harvey Friedmann

Main article: Harvey Friedman

Mythical tree problem · Friedman's vector reduction problem · Friedman's finite ordered tree problem · block subsequence theorem n(4) · Friedman's circle theorem · TREE sequence TREE(3) · subcubic graph number SCG(13) · transcendental integer · finite promise games · Friedman's finite trees · Greedy clique sequence · Bop-counting function

Googology overview

Concepts: googology · large number · eventual domination · ordinal · cardinal · recursion · infinity
Important numbers and functions: googol · googolplex · -illions · hyper operators · Graham's number · Extensible-E System · Bowers' Exploding Array Function · Bird's array notation · TREE sequence · Busy beaver function · fast-growing hierarchy · Rayo's number
People: Chris Bird · Jonathan Bowers · Harvey Friedman · Lawrence Hollom · André Joyce · Leo Moser · Robert Munafo · Sbiis Saibian · Aarex Tiaokhiao