Mold is a period-4 oscillator found by Achim Flammenkamp in 1988 ,[1] but not widely known until Dean Hickerson rediscovered it (and named it) in August 1989 . In terms of its minimum population of 12 cells it ties with mazing as the smallest period-4 oscillator, but in terms of its 6 × 6 bounding box it wins outright. In fact, of all oscillators that fit in a 6 × 7 box it is the only one with period greater than 2.
It emits corner dots , which can support other patterns such as the 45-cell p32 honey farm hassler , four molds hassling eight blocks , traffic circle , "butter ",[2] an unnamed p8 oscillator .
Construction
Mold is known to be constructible with 5 gliders .[3] Several known alternate syntheses are available in Mark Niemiec's database .[4]
x = 36, y = 20, rule = B3/S23
20bo$18b2o$2bo16b2o8bo$obo24b2o$b2o20bo4b2o$23bobo$23b2o2$31b2o$30bo2b
o$30bobo2bo$31bo$32b2obo$34bo4$27bo$26b2o$26bobo!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THEME Book ZOOM 10 AUTOSTART GPS 8 T 0 PAUSE 3 T 20 PAUSE 1 T 36 PAUSE 1 T 49 PAUSE 2 LOOP 50 ]]
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A 5G synthesis[4] (click above to open LifeViewer )
x = 51, y = 24, rule = B3/S23
16b2o28b2o$15bo2bo26bo2bo$15bobo2bo8bo15bobo2bo$16bo3bo9bo6bobo6bo$20b
o7b3o6b2o8b2obo$17bo20bo10bo$18b2o15$b2o$obo$2bo!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THEME Book ZOOM 10 AUTOSTART GPS 8 T 0 PAUSE 3 T 59 PAUSE 1 T 104 PAUSE 2 LOOP 105 ]]
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A three-glider conversion of jam to mold[4] (click above to open LifeViewer )
Occurrence
Mold is the twelfth most common naturally-occurring oscillator in Achim Flammenkamp's census , being less common than the spark coil but more common than the quadpole tie ship .[5] On Catagolue , it is the most common period 4 oscillator, being more common than mazing .[6]
The first natural mold stator variant, cis-mold on dock , occurred in May 2015 .[7]
The octo3obj database contains one collision with a mold in the ash.[8] There are two three-glider collisions in the octo3g database with a mold in the ash; both collisions converge to the same sequence before the mold forms.[9]
See also
References
External links