30P25
30P25 | |||||||||
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Pattern type | Oscillator | ||||||||
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Number of cells | 30 | ||||||||
Bounding box | 20 × 20 | ||||||||
Period | 25 | ||||||||
Mod | 25 | ||||||||
Heat | 28.5 | ||||||||
Volatility | 0.92 | ||||||||
Strict volatility | 0.92 | ||||||||
Discovered by | Charity Engine | ||||||||
Year of discovery | 2022 | ||||||||
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30P25 is a period-25 oscillator discovered by Charity Engine on May 18, 2022 by symmetric soup search.[1] In this oscillator, a symmetric reaction with two copies of an unnamed unstable object is stabilized by two copies of eater 1. In terms of its 30 cells, it is the smallest known period-25 oscillator, later followed by 36P25 and 45P25[2]; all three are far ahead of the previous record (p25 pre-pulsar shuttle) with 83 cells.
On May 18, 2022, a 14-glider synthesis was found; the unstable object has exactly one 3-glider synthesis which is used for both copies, and each of the two fishhooks requires four gliders, for a total of 14.[3] On August 27, 2023, Carson Cheng found a 13-glider synthesis.[4][5]
30P25 gives off sparks, which allows for the construction of non-trivial higher-period LCM oscillators,[6] shown in the gallery below, as well as the following hassler.
A p25 hassler using two instances of 30P25 (Carson Cheng, 2022)[7] (click above to open LifeViewer) Catagolue: here |
LCM oscillators
The oscillators below are listed due to being the smallest known ones by population, while also satisfying the condition that at least one cell oscillates at the full period.
p75 with pentadecathlon (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here |
p200 with figure eight (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here |
p225 with p45 pi-heptomino hassler (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here |
p275 with p11 domino sparker (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here |
p550 with Jason's p22 (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here |
See also
- 32P21, also found by Charity Engine via rotationally symmetric soup search
- Jason's p22, an oscillator that also consists of two eater 1s hassling a rotationally symmetric active reaction
References
- ↑ cvojan (May 18, 2022). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ cis-45P25 at Adam P. Goucher's Catagolue
- ↑ GUYTU6J (May 18, 2022). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Carson Cheng (August 27, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#4961372930) (August 27, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ David Raucci (May 18, 2022). Re: Smallest Known Oscillators to p106 (and Beyond) (discussion thread) at the ConwayLife.com forums
- ↑ David Raucci (October 1, 2022). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
External links
- Patterns
- Oscillators with 30 cells
- Periodic objects with minimum population 30
- Patterns with 30 cells
- Patterns found by Charity Engine
- Patterns found in 2022
- Patterns that can be constructed with 13 gliders
- Oscillators
- Oscillators with period 25
- Oscillators with mod 25
- Oscillators with heat 28
- Oscillators with volatility 0.92
- Oscillators with strict volatility 0.92
- Patterns with 180-degree rotation symmetry
- Sparkers
- Sparkers with period 25
- Non-reflecting duoplet sparkers
- Strong sparkers
- Dot sparkers
- Semi-natural periodic objects
- Unnamed periodic objects