# Chris Bird

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**Chris Bird** is an English mathematician who helped develop and investigate Jonathan Bowers' BEAF, and created a parallel notation called Bird's array notation. His extensions to Array Notation, outlined in his 75-page paper *Array Notations for Super-Huge Numbers*,^{[1]} led to the development of the modern Exploding Array Function. He also proved that Array Notation with 5 or more entries grows much faster than Chained Arrow Notation.^{[2]}

Bird developed his own hierarchy of array notations and extended it up to the Bachmann-Howard ordinal.^{[3]} He later developed a newer version of his notation that he claimed was able to reach \(\psi_0(\Omega_{\omega})\).^{[4]} In 2014, he extended his notation yet again, this time reaching \(\vartheta(\Omega_\Omega)\).

Bird has a master's degree in mathematics, and has stated that he has Asperger's syndrome (an autism spectrum disorder).

## Sources Edit

- ↑ Bird, Chris. Array Notations for Super Huge Numbers. Retrieved 2016-03-25.
- ↑ Bird, Chris. Proof that Bird’s Linear Array Notation with 5 or more entries goes beyond Conway’s Chained Arrow Notation. Retrieved 2013-03-17.
- ↑ Bird, Chris. Beyond Bird's Nested Arrays III. Retrieved 2013-03-17.
- ↑ Bird, Chris. Beyond Bird's Nested Arrays IV. Retrieved 2014-04-09.

## External links Edit

## See alsoEdit

- Bird's number
- Chris Bird's Super Huge Numbers (contains links to most recent versions of his papers)
- Bird's array notation

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