p26 pre-pulsar shuttle
- For other p26 pre-pulsar shuttles, see pre-pulsar shuttle#p26.
| p26 pre-pulsar shuttle | |||||||||
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| Pattern type | Oscillator | ||||||||
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| Oscillator type | Shuttle | ||||||||
| Number of cells | 144 | ||||||||
| Bounding box | 39 × 39 | ||||||||
| Period | 26 | ||||||||
| Mod | 26 | ||||||||
| Heat | 120.6 | ||||||||
| Volatility | 0.95 | ||||||||
| Strict volatility | 0.95 | ||||||||
| Discovered by | David Buckingham | ||||||||
| Year of discovery | 1983 | ||||||||
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p26 pre-pulsar shuttle is a period-26 pre-pulsar shuttle oscillator discovered by David Buckingham on January 18, 1983 with an alternate stabilization using beehives rather than blinkers.[1] Its original form was the first period-26 oscillator to be found. It is composed of four 14-generation pre-pulsar shuttle mechanisms that use a blinker stabilization found by Noam Elkies on April 22, 1997,[2] as well as a central 12-generation pre-pulsar shuttle mechanism composed of four beacons. On November 17, 2016, Maia Karpovich found a smaller 14-generation pre-pulsar shuttle mechanism, resulting in a 144-cell variant of this oscillator.[3]
The 200-cell variant was the smallest known period-26 oscillator (in terms of minimum population) until the discovery of the p26 dependent reflector loop in February 2012. The smallest known period-26 oscillator is currently 60P26.
On July 8, 2023, Chris857 found a 280-glider synthesis of the 144-cell form of the oscillator.[4][5] Over the next few days, he and Carson Cheng reduced the synthesis cost multiple times, down to 234 gliders.[6][7][8][9][10][11][12] On September 6, 2023, Chris857 lowered the synthesis cost to 226 gliders.[13][14]
Gallery
| The original pre-pulsar shuttle 26 (click above to open LifeViewer) RLE: here Plaintext: here |
See also
References
- ↑ Dean Hickerson's oscillator stamp collection.
- ↑ Jason Summers' all-osc oscillators collection
- ↑ Matthias Merzenich (November 17, 2016). Re: Soup Search Results (discussion thread) at the ConwayLife.com forums
- ↑ Chris857 (July 8, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#4618837345) (July 9, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ Chris857 (July 9, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ Carson Cheng (July 9, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ Chris857 (July 10, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#4619103056) (July 9, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ shinjuku (#4619980608) (July 9, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ shinjuku (#4620311580) (July 9, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ shinjuku (#4620784392) (July 10, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ Chris857 (September 4, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#5026782587) (September 6, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
External links
- p26 pre-pulsar shuttle at Adam P. Goucher's Catagolue
- p26 pre-pulsar shuttle (original) at Adam P. Goucher's Catagolue
- Patterns
- Oscillators with between 140 and 149 cells
- Periodic objects with minimum population between 140 and 149
- Patterns with between 140 and 149 cells
- Patterns found by David Buckingham
- Patterns found in 1983
- Patterns that can be constructed with between 200 and 299 gliders
- Oscillators
- Shuttles
- Oscillators with period 26
- Oscillators with mod 26
- Oscillators with heat between 120 and 129
- Oscillators with volatility 0.95
- Oscillators with strict volatility 0.95
- Patterns with complete square symmetry
- Pre-pulsar shuttle oscillators