# David Bell

David Bell | |

Born | Unknown |
---|---|

Residence | Australia |

Nationality | American |

Institutions | Unknown |

Alma mater | Unknown |

**David Ingalls Bell** is a Life enthusiast who was born and educated in the United States but now lives in Australia. He has discovered and helped construct some of the most interesting known patterns, with a heavy focus on spaceships.

In 2004, he and Jason Summers helped Gabriel Nivasch build caterpillar; the first 17c/45 spaceship to be constructed. He also found 25P3H1V0.1, one of the smallest-known c/3 orthogonal spaceships, and spider, the smallest-known c/5 orthogonal spaceship. He has also found several patterns that are the first examples of spaceships with their particular speed and period: c/2 orthogonal period 22, c/2 orthogonal period 26, c/3 orthogonal period 12, c/4 orthogonal period 20, 2c/5 orthogonal period 10, c/5 orthogonal period 30 (with Noam Elkies), c/3 orthogonal period 36, c/3 orthogonal period 24, c/3 orthogonal period 15, c/2 orthogonal period 6, and c/3 orthogonal period 9.

He was the first person to explicitly construct a unit Life cell: the p5760 unit Life cell. Other notable constructions include the infinite glider hotel and moving sawtooth.

He also has explored some other Life-like cellular automata in some depth, most notably HighLife.

## Patterns found by David Bell

## 1## 4## 5## 6## B## C |
## D## E## F## I## L## M## N## P |
## S- Sawtooth 1163
- Sawtooth 260
- Sawtooth 362
- Slow puffer 1
- Slow puffer 2
- Spacefiller 1
- Spider
- Switch engine channel
## W |

## References

- "Game of Life Status page". Retrieved on May 21, 2009.

## External links

- Homepage of David Ingalls Bell