Chris Bird has done a lot of work on large numbers, including much original work that goes beyond that of others. He has created a system of fast-growing recursive functions that rivals or exceeds the functions of Jonathan Bowers and others.

Of the following files, the first describes the relationship between his linear arrays (the first and slowest-growing of his recursive functions) and the well-known Conway chained arrow notation. The numbered chapters are a series describing Bird's functions and notation step by step. The Fast-Growing Hierarchy in Terms of Bird’s Array Notations, as the title indicates, correlates Bird's work with the Fast-growing hierarchy and the Veblen hierarchy, and also to a few other well-known notations and functions such as Conway arrows, Friedman, Goodstein, etc. (the other documents also have some references to these functions).

These versions were written in 2012, with substantial updates to the later chapters in 2013 and 2014; much of the material is similar to earlier work by Chris Bird going back to 2006 or earlier. He lives in the United Kingdom, and holds a Master's degree in mathematics despite suffering from Asperger's Syndrome (a form of autism).

Chris Bird's Super Huge Numbers  

Proof that Bird's Linear Array Notation with 5 or more entries goes beyond Conway's Chained Arrow Notation.

1. Linear Array Notation (last updated 1 Apr 2012)

2. Multi-Dimensional Array Notation (last updated 2 Apr 2012)

3. Hyper-Dimensional Array Notation (last updated 2 Aug 2017 with minor corrections on pages 4-5)

4. Nested Array Notation (last updated 31 Aug 2013 with additions on pages 9-10)

5. Beyond Nested Arrays I (last updated 6 Sep 2017 with minor corrections on page 12; corrections on pages 6-8 made on 13 Dec 2013)

6. Beyond Nested Arrays II (last updated 6 Sep 2017 with minor corrections on page 6; minor corrections on pages 18-19 made on 10 Feb 2015; subscripts of subscripts made on 14 Mar 2014)

7. Beyond Nested Arrays III (last updated 14 Mar 2014 to allow subscripts of subscripts)

8. Beyond Nested Arrays IV (last updated 25 Mar 2014 to allow subscripts of subscripts; minor changes to 'counter' variables on 25 Feb 2014)

9. Beyond Nested Arrays V (NEW; last updated 12 May 2014; adapted from the original Beyond Nested Arrays IV)

The Fast-Growing Hierarchy in Terms of Bird’s Array Notations (last updated 28 Mar 2014)

Bowers' Named Numbers

This is an auxiliary document listing many of the "named" big numbers of Jonathan Bowers, and giving values of these in terms of Bird's notation.

Bowers' Named Numbers (last updated 19 Mar 2012)

These files are written by and are copyright © 2006-2020 Chris Bird.

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