Jam

Jam
3b2ob$2bo2bo$o2bobo$o3bob$o5b$3bo2b$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 GPS 2 ]]
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Pattern type	Oscillator
Number of cells	13
Bounding box	7 × 7
Frequency class	27.6
Period	3 (mod: 3)
Heat	7.3
Volatility	0.55 | 0.55
Kinetic symmetry	n
Discovered by	Achim Flammenkamp
Year of discovery	1988
Rules Outer-totalistic rules B3/S23 – B378/S0235678 # of rules 27 = 128 Isotropic rules B3aijnq/S23acqr – B2ci34-ajnz5-ck6-a78/S0234ceqtwyz5678
Glider synthesis Fewest gliders 5 Catagolue-generated RLE synthesis Uploaded synthesis RLE jam_synth.rle
Pattern files Plaintext jam.cells RLE jam.rle
Identifiers apgcode xp3_695qc8zx33 Pentadecathlon ID 13P3.1

Jam is a period-3 oscillator that was found by Achim Flammenkamp in 1988 but not widely known about until its independent discovery (and naming) by Dean Hickerson in September 1989. In terms of its 7 × 7 bounding box it ties with trice tongs as the smallest period-3 oscillator, though caterer has a smaller minimum population.

Commonness

Main article: List of common oscillators

Jam is about the seventeenth most common naturally-occurring oscillator in Achim Flammenkamp's census, being slightly less common than the blocker. On Catagolue, it is the second most common period 3 oscillator, being less common than the pulsar but more common than the trans-block on candlefrobra.

Glider synthesis

A 5-glider synthesis of jam was found on July 8, 2022, and can be found in the infobox to the right.

Loaf substitutes

To support the rotor, an object needs only to have three live cells in a diagonal line in one phase. One of the outer of these is only necessary to suppress a birth in one phase, and can be dead in the other two. As such, other objects and oscillators can support it.

x = 29, y = 27, rule = B3/S23 $5b2o15b2o$bo4bo11bo4bo$obo3bob2o7bobo3bob2o$bob2obob2o5bo2bob2obob2o$5bo9bo6bo$15bo$18bo$16b2o2$4bo2bo13bo2bo$bo2bo2bo2bo7bo2bo2bo2bo$ob3o2b3obo5bob3o2b3obo$bo8bo4bo2bo8bo$15bo$15bo$18bo$16b2o3$bo8bo7bo8bo$obo6bobo5bobo6bobo$bob2o2b2obo4bo2bob2o2b2obo$4bo2bo7bo5bo2bo$4bo2bo7bo5bo2bo$18bo$16b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 WIDTH 720 HEIGHT 720 ZOOM 18 GPS 2 AUTOSTART ]]

Jam on candlefrobra, short keys and bent keys (click above to open LifeViewer)

Dependent oscillators

There are several unstable objects that may supported by two jams.

x = 6, y = 15, rule = B3/S23 3b2o$2bo2bo$o2bobo$o3bo$o2$b3o$4b2o$b3o2$o$o3bo$o2bobo$2bo2bo$3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 WIDTH 560 HEIGHT 560 ZOOM 30 GPS 2 AUTOSTART ]] (click above to open LifeViewer) Catagolue: here

x = 11, y = 11, rule = B3/S23 3b2o$2bo2bo$o2bobo$o3bo$o$8b2o$b3o3bo2bo$3b2o3bobo$4bo4bo$4bo$6b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 WIDTH 560 HEIGHT 560 ZOOM 30 GPS 2 AUTOSTART ]] Only a dot spark in one phase (click above to open LifeViewer) Catagolue: here

See also

• Crown
• Jam on Beluchenko's p13
• Jam on 44P7.2
• Mold

External links

• Jam at the Life Lexicon
• Jam at Adam P. Goucher's Catagolue
• 13P3.1 at Heinrich Koenig's Game of Life Object Catalogs