Rob's p16

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Rob's p16
x = 8, y = 9, rule = B3/S23 5b2o$2bo2b2o$bo4bo$bo4bo$6bo$2obobo$2ob2o2$5b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 4 LOOP 16 ]]
Pattern type Oscillator
Number of cells 21
Bounding box 10×12
Period 16
Mod 8
Heat 21
Volatility 1.00
Strict volatility 1.00
Discovered by Rob Liston
Year of discovery 2020

Rob's p16 is a period-16 oscillator that was found by Rob Liston on February 9, 2020 using Adam P. Goucher's apgsearch,[1] and first noticed by a human the next day.[2] It is the smallest known period-16 oscillator in terms of both population and bounding box, the first p16 to appear naturally, the first known strictly volatile p16, and the first new rotor discovered by asymmetric soup search since the 1980s. It also gives off weak sparks,[3] which can be used to filter an LWSS stream resulting in a reduction to the period-16 pseudo-glider gun.[4] On November 12, JP21 constructed a p32 lumps of muck hassler using this oscillator.[5]

A 17-glider synthesis of this oscillator was found by Tanner Jacobi the day of its discovery.[6] Liston found a second Rob's p16 soup on June 30,[7] leading to a 15-glider synthesis by Goldtiger997 the next day.[8] Yet another soup found by Liston in February 2021 reduced the cost 13 and then 11 gliders.[9][10] A fifth soup by Adam P. Goucher (incidentally the first soup not found by Liston) led to a 10-glider synthesis,[11] which Dave Greene made a slow-salvo seed out of.[12]

See also

References

  1. Adam P. Goucher. "Haul". Catagolue. Retrieved on February 10, 2020.
  2. Tanner Jacobi (February 10, 2020). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
  3. Matthias Merzenich (February 10, 2020). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
  4. Tanner Jacobi (February 11, 2020). Re: Execution of Old Guns by Variable-Speed Firing Squad (discussion thread) at the ConwayLife.com forums
  5. JP21 (November 12, 2020). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
  6. Tanner Jacobi (February 10, 2020). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
  7. Aidan F. Pierce (June 30, 2020). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  8. Goldtiger997 (July 1, 2020). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  9. goldenratio (February 14, 2021). Message in #cgol on the Conwaylife Lounge Discord server
  10. Goldtiger997 (February 14, 2021). Message in #cgol on the Conwaylife Lounge Discord server
  11. Tanner Jacobi (March 25, 2021). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  12. Dave Greene (March 25, 2021). Re: Soup search results (discussion thread) at the ConwayLife.com forums

External links