Quadpole

Quadpole
5b2o$4bobo2$2bobo2$obo$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]
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Pattern type	Oscillator
Family	Barberpole
Number of cells	10
Bounding box	7×7
Frequency class	21.8
Period	2
Mod	1
Heat	8
Volatility	0.57
Strict volatility	0.57
Rotor type	Pole 4
Discovered by	MIT group
Year of discovery	1970
Rules Outer-totalistic rules B3/S23 – B35678/S2345678 Important rules Conway Life, HighLife # of rules 29 = 512 Isotropic rules B3c/S2ae3n – B2ckn34-r5678/S1e2345678
Glider synthesis Fewest gliders 5 Catagolue-generated RLE quadpole_synth.rle Uploaded synthesis RLE quadpole_synth.rle
Pattern files Plaintext quadpole.cells RLE quadpole.rle
Identifiers apgcode xp2_0g0k053z32 Pentadecathlon ID 10P2.1

The quadpole (or tetrapole) is the barberpole of length 4.

Commonness

The quadpole is the eighth most common oscillator in Achim Flammenkamp's census, being less common than the bipole but more common than the great on-off. It is the eighth most common oscillator on Adam P. Goucher's Catagolue. Despite behaving the same in Life as they do in HighLife, they are only about 2% as common in HighLife because the ship is not stable, preventing the reaction below from occurring.

The most common way by far for a quadpole to form is from a century predecessor hitting a ship. This is the basis of a 3-glider component found by Heinrich Koenig no later than July 2010.

x = 7, y = 8, rule = B3/S23 bo$o$o$b3o2$4b2o$4bobo$5b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 GPS 2 LOOP 10 PAUSE 3 AUTOSTART ]]

Quadpole forming when a century predecessor collides with a ship (click above to open LifeViewer) RLE: here Plaintext: here

Glider synthesis

All strict still lifes with a population of 20 or fewer cells, as well as all oscillators and spaceships with 16 or fewer cells, are known to be glider-constructible. A glider synthesis of this object can be found in the infobox to the right.

See also

• Quadpole tie ship

External links

• Quadpole at the Life Lexicon

• Quadpole at Adam P. Goucher's Catagolue

• 10P2.1 at Heinrich Koenig's Game of Life Object Catalogs