p76 pi-heptomino shuttle

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Not to be confused with p76 pi-heptomino hassler.
p76 pi-heptomino shuttle
x = 27, y = 20, rule = B3/S23 2o23b2o$bo23bo$bobo19bobo$2b2o19b2o3$6b3o$7bo$3bo4bobo12bo$2bobo17bobo $2bobo17bobo$3bo4bobo12bo$7bo$6b3o3$2b2o19b2o$bobo19bobo$bo23bo$2o23b 2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ HEIGHT 600 THUMBSIZE 3 ZOOM 15 GPS 8 ]]
Pattern type Oscillator
Number of cells 52
Bounding box 27 × 20
Period 76 (mod: 38)
Heat 25.1
Volatility 0.93 | 0.90
Kinetic symmetry -e+e
Discovered by Carson Cheng
Year of discovery 2023

p76 pi-heptomino shuttle is a small period-76 oscillator found by Carson Cheng on September 24, 2023.[1] At 52 cells, it is the smallest known period-76 oscillator by population. Two pi-heptominoes are each perturbed by a fishhook. This particular reaction leaves a blinker and a larger active region. Using a known transparent beehive reaction using two blinkers, these blinkers can be eaten by the transparent beehive, and the spark it creates interacts with the other larger pair of active regions to then form two pi-heptominoes that can then have the same thing happen in the other direction, making a shuttle.

Chris857 found a 20-glider synthesis of the shuttle the day after its discovery.[2][3]

Gallery

3b2o$2bo2bo$o2b2o2bo$o6bo$o6bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 24 GPS 8 ]]
The transparent beehive reaction
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x = 35, y = 20, rule = B3/S23 8b2o23b2o$9bo23bo$9bobo19bobo$2bo7b2o19b2o$2b3o$2o3bo9bo$bo2bobo7b3o$b obo2b3o5bo2bo$2bo8bo19bo$3b2o5bobo17bobo$4bo5bobo17bobo$4bo6bo19bo$14b o2bo$14b3o$15bo2$10b2o19b2o$9bobo19bobo$9bo23bo$8b2o23b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 25 THUMBSIZE 2 ZOOM 10 HEIGHT 450 THEME BOOK STARTFROM 321 ]]
The smallest known oscillator of period 228 is an LCM oscillator comprised of a pulsar quadrant and a p76 pi-heptomino shuttle.[4]
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Catagoluehere


See also

References

  1. Carson Cheng (September 24, 2023). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
  2. Chris857 (September 17, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  3. shinjuku (#5154514610) (September 25, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  4. Period1GliderGun (January 28, 2024). Re: Smallest Known Oscillators to p106 (and Beyond) (discussion thread) at the ConwayLife.com forums

External links