Difference between revisions of "P42 glider shuttle"
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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 [[RLE:P66|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. | ||
==Image gallery== | ==Image gallery== | ||
Revision as of 06:19, 15 January 2019
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| Pattern type | Oscillator | ||||||||
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| Oscillator type | Shuttle | ||||||||
| Number of cells | 143 | ||||||||
| Bounding box | 32 × 32 | ||||||||
| Period | 42 | ||||||||
| Mod | 21 | ||||||||
| Heat | 56.1 | ||||||||
| Volatility | 0.75 | ||||||||
| Strict volatility | 0.33 | ||||||||
| Discovered by | Noam Elkies | ||||||||
| Year of discovery | 1994 | ||||||||
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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
See also
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on July 8, 2010.
External links
Categories:
- Patterns
- Oscillators with between 140 and 149 cells
- Periodic objects with minimum population between 140 and 149
- Patterns with between 140 and 149 cells
- Patterns found by Noam Elkies
- Patterns found in 1994
- Oscillators
- Shuttles
- Oscillators with period 42
- Oscillators with mod 21
- Oscillators with heat 56
- Oscillators with volatility 0.75
- Oscillators with strict volatility 0.33
- Patterns with bilateral diagonal symmetry
- Flipping oscillators