p18 bi-block hassler
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| p18 bi-block hassler | |||||||||
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| Pattern type | Oscillator | ||||||||
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| Number of cells | 43 | ||||||||
| Bounding box | 21 × 15 | ||||||||
| Period | 18 (mod: 18) | ||||||||
| Heat | 27.4 | ||||||||
| Volatility | 0.85 | 0.23 | ||||||||
| Kinetic symmetry | n | ||||||||
| Discovered by | Noam Elkies | ||||||||
| Year of discovery | 1995 | ||||||||
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p18 bi-block hassler (or 43P18) is a period-18 oscillator discovered by Noam Elkies on February 20, 1995.[1] In terms of its 43 cells, it is the smallest known period 18 oscillator.[2][3] The unix on the bottom can be positioned in 2 places.
It is composed of two copies of unix that are hassling a bi-block, as shown below.
A 13-glider synthesis of the oscillator was found in August 2021.[4] A 12-glider synthesis was found in March 2023.[5][6]
Gallery
 Generation 14 reveals that the oscillator is made up of two copies of unix and a bi-block. |
See also
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on June 16, 2009.
- ↑ "Class 2 Objects Catalog". Retrieved on April 11, 2009.
- ↑ Jason Summers' all-osc pattern collection. Retrieved on April 12, 2009.
- ↑ mattiward (August 29, 2021). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#4015626809) (March 28, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ Carson Cheng (March 25, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
External links
- p18 bi-block hassler at Adam P. Goucher's Catagolue
- 43P18.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 43 cells
- Periodic objects with minimum population 43
- Patterns with 43 cells
- Patterns found by Noam Elkies
- Patterns found in 1995
- Patterns that can be constructed with 12 gliders
- Oscillators
- Oscillators with period 18
- Oscillators with mod 18
- Oscillators with heat 27
- Oscillators with volatility 0.85
- Oscillators with strict volatility 0.23
- Oscillators with n symmetry
- Sparkers
- Sparkers with period 18
- Weak sparkers