28P7.3

28P7.3
x = 10, y = 13, rule = B3/S23 obo$2obo$3bo2b2o$2obobobo$o2bo2bo$2bo$4bo$2b3o2$6b2o$6bobo$8bo$8b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ HEIGHT 600 THUMBSIZE 3 ZOOM 30 THEME 6 GPS 7 AUTOSTART ]]
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Pattern type	Oscillator
Number of cells	28
Bounding box	10 × 13
Period	7
Mod	7
Heat	8
Volatility	0.55
Strict volatility	0.55
Discovered by	Bullet51
Year of discovery	2017
Rules Outer-totalistic rules B3/S23 – B378/S2378 # of rules 24 = 16 Isotropic rules B3-y/S2-n3-k – B34ceyz5ik6-kn78/S234ceitz5-inq6-a78
Glider synthesis Fewest gliders 24† Catagolue-generated RLE synthesis Uploaded synthesis RLE 28p7.3_synth.rle †Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext 28p7.3.cells RLE 28p7.3.rle
Identifiers apgcode xp7_5b8b94gszw652y06a8o

28P7.3 is an unnamed period-7 oscillator discovered by Bullet51 on December 26, 2017. In terms of its 28 cells, it is tied with oscillators burloaferimeter, 28P7.1 and 28P7.2 as the smallest known period 7 oscillator. It contains an eater 1 that can be replaced with another copy of this mechanism. Its boat can act as an eater 1, and thus this oscillator is infinitely extensible. Because its boat acts as an eater 1, it can eat gliders, LWSS, MWSS and loafers (with the help of an eater 1). It is used to turn the pi output from p21 B-heptomino hassler into a gun.

Gallery

x = 11, y = 18, rule = B3/S23 8bobo$7bob2o$3b2o2bo$3bobobob2o$4b2obob2o$5bo2bo$6bobo$6bobo$6b2o$3b2o $2bobo$2bobo$2bo2bo$2obob2o$2obobobo$3bo2b2o$2obo$obo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 480 THUMBLAUNCH THUMBSIZE 2 ZOOM 20 THEME 6 GPS 7 AUTOSTART LOOP 7 ]]

Two copies of 28P7.3 interacting with each other (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

x = 17, y = 13, rule = B3/S23 obo$2obo$3bo2b2o$2obobobo2b2o$o2bo2bo5bo$2bo6bo$4bo4bo3bo$2b3o4bo3b4o$ 11bo$6b2o$6bobo$8bo$8b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 400 THUMBLAUNCH THUMBSIZE 2 ZOOM 20 THEME 6 GPS 10 AUTOSTART ]]

Caterer on 28P7.3, the former smallest known p21 oscillator by population (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

See also

• 33P3.1

External links

• 28P7.3 at Adam P. Goucher's Catagolue