P43 Snark loop: Difference between revisions
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updated synthesis |
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|name = p43 Snark loop | |name = p43 Snark loop | ||
|pname = p43gliderloop | |pname = p43gliderloop | ||
|f1 | |f1 = Relay | ||
|c = 228 | |c = 228 | ||
|bx = 65 | |bx = 65 | ||
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|isorulemin = B3/S23 | |isorulemin = B3/S23 | ||
|isorulemax = B34c8/S234c5e6n8 | |isorulemax = B34c8/S234c5e6n8 | ||
|synthesis = | |synthesis = 164 | ||
|rle = true | |rle = true | ||
|viewerconfig = #C [[ THUMBSIZE 2 GPS 10 LOOP 43 ZOOM 8 HEIGHT 600 WIDTH 600 POPUPHEIGHT 600 POPUPWIDTH 600 ]] | |viewerconfig = #C [[ THUMBSIZE 2 GPS 10 LOOP 43 ZOOM 8 HEIGHT 600 WIDTH 600 POPUPHEIGHT 600 POPUPWIDTH 600 ]] | ||
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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. | 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, {{year|2019}}.<ref name="post77388" /> This was reduced to 196 gliders on October 16, {{year|2020}} by [[MathAndCode]] and [[GUYTU6J]].<ref name=" | A 226-[[glider]] [[synthesis]] of this oscillator was discovered by Jeremy Tan on June 9, {{year|2019}}.<ref name="post77388" /> This was reduced to 196 gliders on October 16, {{year|2020}} by [[MathAndCode]] and [[GUYTU6J]],<ref name="post106801" /> and then to 164 gliders in April {{year|2021}} by [[MathAndCode]] and [[Dave Greene]].<ref name="message833837469395976213" /> | ||
==References== | ==References== | ||
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|author = GUYTU6J | |author = GUYTU6J | ||
|date = October 16, 2020 | |date = October 16, 2020 | ||
}}</ref> | |||
<ref name="message833837469395976213">{{CiteDiscord | |||
|author = MathAndCode | |||
|date = April 20, 2021 | |||
|channel = cgol | |||
|id = 833837469395976213 | |||
}}</ref> | }}</ref> | ||
</references> | </references> | ||
Revision as of 12:40, 20 April 2021
| 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 | Unspecified | ||||||||
| 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 164 gliders in April 2021 by MathAndCode and Dave Greene.[3]
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
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
- Patterns with 90-degree rotation symmetry