# p43 Snark loop

Jump to navigation
Jump to search

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 | ||||||||||

Strict volatility | 0.81 | ||||||||||

Discovered by | Mike Playle | ||||||||||

Year of discovery | 2013 | ||||||||||

| |||||||||||

| |||||||||||

| |||||||||||

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]}

## 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
- 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