Difference between revisions of "P42 glider shuttle"

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{{Oscillator|name=p42 glider shuttle|pname=p42glidershuttle|p=42|c=143|bx=32|by=32|h=56.1|discoverer=Noam Elkies|discoveryear=1994|animated=true|rle=true|life105=true|life106=true|plaintext=true|v=0.75|rulespecial=[[Conway's Game of Life|Conway Life]]|rulemin=B3/S23|rulemax=B38/S23678}}
+
{{Oscillator
 +
|name         = p42 glider shuttle
 +
|pname       = p42glidershuttle
 +
|c           = 143
 +
|bx           = 32
 +
|by           = 32
 +
|p            = 42
 +
|h           = 56.1
 +
|v            = 0.75
 +
|discoverer   = Noam Elkies
 +
|discoveryear = 1994
 +
|rulemin      = B3/S23
 +
|rulemax      = B38/S23678
 +
|rulespecial = [[Conway's Game of Life|Conway Life]]
 +
|life105      = true
 +
|life106      = true
 +
|plaintext    = true
 +
|rle          = true
 +
|animated    = true
 +
}}
 
The '''p42 glider shuttle''' is a [[period]]-[[:Category:oscillators with period 42|42]] [[shuttle]] [[oscillator]] discovered by [[Noam Elkies]] in [[:Category:patterns found in 1994|1994]]. It was the first non-trivial period-42 oscillator to be discovered<ref>{{CiteHickersonOscillators|accessdate=July 8, 2010}}</ref> and is based on a period-66 oscillator discovered by [[Robert Wainwright]] in September, [[:category:patterns found in 1984|1984]]. It works by using two copies of [[eater 3]] and four copies of [[unix]] to shuttle two [[glider]]s back and forth. By increasing the distance between the two reflectors, oscillators of periods 42 + 24n can be created. [[Dean Hickerson]] found that the distance between the reflectors could be decreased using a custom period-6 oscillator to create a period-18 glider shuttle. In April, [[:Category:patterns found in 1992|1992]] Hickerson created another related oscillator by crossing two pairs of gliders using [[rephaser]]s, which allowed the construction of oscillators of periods 246 + 24n.
 
The '''p42 glider shuttle''' is a [[period]]-[[:Category:oscillators with period 42|42]] [[shuttle]] [[oscillator]] discovered by [[Noam Elkies]] in [[:Category:patterns found in 1994|1994]]. It was the first non-trivial period-42 oscillator to be discovered<ref>{{CiteHickersonOscillators|accessdate=July 8, 2010}}</ref> and is based on a period-66 oscillator discovered by [[Robert Wainwright]] in September, [[:category:patterns found in 1984|1984]]. It works by using two copies of [[eater 3]] and four copies of [[unix]] to shuttle two [[glider]]s back and forth. By increasing the distance between the two reflectors, oscillators of periods 42 + 24n can be created. [[Dean Hickerson]] found that the distance between the reflectors could be decreased using a custom period-6 oscillator to create a period-18 glider shuttle. In April, [[:Category:patterns found in 1992|1992]] Hickerson created another related oscillator by crossing two pairs of gliders using [[rephaser]]s, which allowed the construction of oscillators of periods 246 + 24n.
  

Revision as of 11:19, 19 June 2016

p42 glider shuttle
x = 32, y = 32, rule = B3/S23 22b2o$21bo2bo$10bo13bo$9bobo12bo$10bo7bo3bobo$17bo3bobo$8b5o4bo4bo$7bo 4bo5b4o4b2o$6bob2o16b2o2b2o$3bo2bobo15b2obo2b2o$2bobobo9bo7b3o$3bo2bo 4b3o3b2o$6b2o3b2o3b2o$11bo13b2o$25b2o2$10bobo$5b2o4b2o$4bo2bo3bo7b2o$ 7bo10bo2bo2b2o$7bo10bobo4bo2bo$bo3bobo11bo5bobobo$o3bobo15b2obo2bo$o4b o16bo2bo$b4o4b2o8bo4bo$9b2o2b2o4b5o$7b2obo2b2o$7b3o11bo$20bobo$21bo$8b 2o$8b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]]
Pattern type Oscillator
Number of cells 143
Bounding box 32×32
Period 42
Mod Unknown
Heat 56.1
Volatility 0.75
Strict volatility Unknown
Discovered by Noam Elkies
Year of discovery 1994

The p42 glider shuttle is a period-42 shuttle oscillator discovered by Noam Elkies in 1994. It was the first non-trivial period-42 oscillator to be discovered[1] and is based on a period-66 oscillator discovered by Robert Wainwright in September, 1984. It works by using two copies of eater 3 and four copies of unix to shuttle two gliders back and forth. By increasing the distance between the two reflectors, oscillators of periods 42 + 24n can be created. Dean Hickerson found that the distance between the reflectors could be decreased using a custom period-6 oscillator to create a period-18 glider shuttle. In April, 1992 Hickerson created another related oscillator by crossing two pairs of gliders using rephasers, which allowed the construction of oscillators of periods 246 + 24n.

Image gallery

A p18 glider shuttle using a custom period-6 oscillator by Dean Hickerson
RLE: here
A related p246 oscillator discovered by Dean Hickerson
RLE: here

See also

References

  1. Dean Hickerson's oscillator stamp collection. Retrieved on July 8, 2010.

External links