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.

References

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

External links

• David Bell at Mark D. Niemiec's Life Page (Life Credits)
• Homepage of David Ingalls Bell

Patterns found by David Bell

(

• (13,1)c/31 Pseudo-B climber

1

• 117P9H3V0

2

• 25P3H1V0.2

4

• 4-engine Cordership

5

• 5-engine Cordership

6

• 60P3H1V0.3

A

• Achim's p144

B

• B-52 bomber
• Barge (spaceship)
• Blinker puffer 2
• Bracket quasar
• Brain
• Bricklayer

C

• Caterpillar
• Collatz 5n+1 simulator

D

• Dart

E

• Edge-repair spaceship 1

F

• Fly

I

• Infinite glider hotel

L

• Lidka

M

• Moving sawtooth

N

• New gun 2

P

• P5760 unit Life cell
• Pi ship 1
• Pre-pulsar spaceship
• Pushalong 1

S

• Sawtooth 1163
• Sawtooth 260
• Sawtooth 362
• Slow puffer 1
• Slow puffer 2
• Spacefiller 1
• Spider
• Switch engine channel

W

• Wasp