Paul Callahan

Paul Callahan
Born	Unknown
Residence	United States
Nationality	Unknown
Institutions	Unknown
Alma mater	Johns Hopkins University

Paul Callahan is a Life enthusiast.

He expanded David Buckingham's Herschel conduit mechanisms, building the first known stable glider reflectors. He also carried out computer searches to find some of the smallest patterns exhibiting infinite growth, including the smallest possible one cell thick infinite growth pattern.

Patterns found by Paul Callahan

4

• 49P88

B

• Bistable switch
• Bunnies 9
• Bx125
• Bx222

C

• Callahan G-to-H

F

• F116
• F166
• Fx153
• Fx176

G

• Glider stopper
• Glider to block

H

• HFx58B
• Herschel receiver
• Herschel transmitter

L

• Lx200

P

• P61 Herschel loop 2
• P8 G-to-H
• PF35W
• Period-44 glider gun

References

• "Life Credits". Mark D. Niemiec. Retrieved on June 12, 2009.

External links

• Life page of Paul Callahan
• Paul Callahan at the Mathematics Genealogy Project