p26 pre-pulsar shuttle

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For other p26 pre-pulsar shuttles, see pre-pulsar shuttle#p26.
p26 pre-pulsar shuttle
x = 39, y = 39, rule = B3/S23 12b2o11b2o$12b2o3bo3bo3b2o$17bo3bo$17bo3bo$11bo15bo$10bobo13bobo$11bo 3b3o3b3o3bo$15bobo3bobo$15b3o3b3o2$5bo27bo$4bobo25bobo$2o3bo27bo3b2o$ 2o35b2o$16b2o3b2o$6b3o8bo3bo8b3o$6bobo5bo9bo5bobo$b3o2b3o5b2o7b2o5b3o 2b3o4$b3o2b3o5b2o7b2o5b3o2b3o$6bobo5bo9bo5bobo$6b3o8bo3bo8b3o$16b2o3b 2o$2o35b2o$2o3bo27bo3b2o$4bobo25bobo$5bo27bo2$15b3o3b3o$15bobo3bobo$ 11bo3b3o3b3o3bo$10bobo13bobo$11bo15bo$17bo3bo$17bo3bo$12b2o3bo3bo3b2o$ 12b2o11b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 6 ZOOM 8 LOOP 26 PAUSE 3 HEIGHT 400 ]]
Pattern type Oscillator
Oscillator type Shuttle
Number of cells 144
Bounding box 39 × 39
Period 26
Mod 26
Heat 120.6
Volatility 0.95
Strict volatility 0.95
Discovered by David Buckingham
Year of discovery 1983

p26 pre-pulsar shuttle is a period-26 pre-pulsar shuttle oscillator discovered by David Buckingham on January 18, 1983 with an alternate stabilization using beehives rather than blinkers.[1] Its original form was the first period-26 oscillator to be found. It is composed of four 14-generation pre-pulsar shuttle mechanisms that use a blinker stabilization found by Noam Elkies on April 22, 1997,[2] as well as a central 12-generation pre-pulsar shuttle mechanism composed of four beacons. On November 17, 2016, Maia Karpovich found a smaller 14-generation pre-pulsar shuttle mechanism, resulting in a 144-cell variant of this oscillator.[3]

The 200-cell variant was the smallest known period-26 oscillator (in terms of minimum population) until the discovery of the p26 dependent reflector loop in February 2012. The smallest known period-26 oscillator is currently 60P26.

On July 8, 2023, Chris857 found a 280-glider synthesis of the 144-cell form of the oscillator.[4][5] Over the next few days, he and Carson Cheng reduced the synthesis cost multiple times, down to 234 gliders.[6][7][8][9][10][11][12] On September 6, 2023, Chris857 lowered the synthesis cost to 226 gliders.[13][14]

Gallery

Generation 4 reveals four pre-pulsars (black) being hassled by a 14-generation mechanism (green) and a 12-generation mechanism (red)


x = 40, y = 39, rule = B3/S23 17b2o3b2o$16bo2bobo2bo$12b2o3b2o3b2o3b2o$12bo15bo$9b2obo15bob2o$8bobob 2o13b2obobo$8bobo5b3o3b3o5bobo$6b2o2bo5bobo3bobo5bo2b2o$5bo4b2o4b3o3b 3o4b2o4bo$5b5o21b5o$9bo21bo$3b4o27b4o$3bo2bo27bo2bo2$17b2o3b2o$2bo4b3o 8bo3bo8b3o4bo$bobo3bobo5bo9bo5bobo3bobo$bobo3b3o5b2o7b2o5b3o3bobo$2bo 35bo2$2bo35bo$bobo3b3o5b2o7b2o5b3o3bobo$bobo3bobo5bo9bo5bobo3bobo$2bo 4b3o8bo3bo8b3o4bo$17b2o3b2o2$3bo2bo27bo2bo$3b4o27b4o$9bo21bo$5b5o21b5o $5bo4b2o4b3o3b3o4b2o4bo$6b2o2bo5bobo3bobo5bo2b2o$8bobo5b3o3b3o5bobo$8b obob2o13b2obobo$9b2obo15bob2o$12bo15bo$12b2o3b2o3b2o3b2o$16bo2bobo2bo$ 17b2o3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 8 HEIGHT 350 ]]
The original pre-pulsar shuttle 26
(click above to open LifeViewer)
RLE: here Plaintext: here

See also

References

  1. Dean Hickerson's oscillator stamp collection.
  2. Jason Summers' all-osc oscillators collection
  3. Matthias Merzenich (November 17, 2016). Re: Soup Search Results (discussion thread) at the ConwayLife.com forums
  4. Chris857 (July 8, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  5. shinjuku (#4618837345) (July 9, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  6. Chris857 (July 9, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  7. Carson Cheng (July 9, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  8. Chris857 (July 10, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  9. shinjuku (#4619103056) (July 9, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  10. shinjuku (#4619980608) (July 9, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  11. shinjuku (#4620311580) (July 9, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  12. shinjuku (#4620784392) (July 10, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  13. Chris857 (September 4, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  14. shinjuku (#5026782587) (September 6, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.

External links