p43 Snark loop
(Redirected from P43 glider loop)
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| p43 Snark loop | |||||||||
| View static image | |||||||||
| Pattern type | Oscillator | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Oscillator type | Relay | ||||||||
| Number of cells | 228 | ||||||||
| Bounding box | 65 × 65 | ||||||||
| Period | 43 (mod: 43) | ||||||||
| Heat | 66.05 | ||||||||
| Volatility | 0.81 | 0.81 | ||||||||
| Kinetic symmetry | rc | ||||||||
| Discovered by | Mike Playle | ||||||||
| Year of discovery | 2013 | ||||||||
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The p43 Snark loop is a period-43 oscillator made from Snark reflectors. It is the smallest of an infinite family of Snark-based adjustable glider loops that can have any period from 43 up.
There are much smaller glider loops containing four gliders, with a total signal path length of 216+8n and therefore adjustable to any period of the form 54+2n. However, this is the smallest loop that can contain eight gliders, which is a requirement for universal adjustability.
A 226-glider synthesis of this oscillator was discovered by Jeremy Tan on June 9, 2019.[1] This was reduced to 196 gliders on October 16, 2020 by MathAndCode and GUYTU6J,[2] and then to 131 gliders in April 2021 by MathAndCode and Dave Greene.[3][4][5]
See also
References
- ↑ Jeremy Tan (June 9, 2019). p43 snark loop synthesis (discussion thread) at the ConwayLife.com forums
- ↑ GUYTU6J (October 16, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ MathAndCode (April 20, 2021). Message in #cgol on the Conwaylife Lounge Discord server
- ↑ MathAndCode (April 20, 2021). Message in #cgol on the Conwaylife Lounge Discord server
- ↑ MathAndCode (April 20, 2021). Message in #cgol on the Conwaylife Lounge Discord server
External links
- p43 Snark loop at Adam P. Goucher's Catagolue (extended)
Categories:
- Patterns
- Oscillators with between 200 and 299 cells
- Periodic objects with minimum population between 200 and 299
- Patterns with between 200 and 299 cells
- Patterns found by Mike Playle
- Patterns found in 2013
- Patterns that can be constructed with between 100 and 199 gliders
- Oscillators
- Relays
- Oscillators with period 43
- Prime-period oscillators
- Oscillators with mod 43
- Oscillators with heat 66
- Oscillators with volatility 0.81
- Oscillators with strict volatility 0.81
- Oscillators with rc symmetry