Difference between revisions of "P29 pre-pulsar shuttle"
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|apgcode = xp29_y8ca23z252y24eexcczg8gy28ssy366xg0s4z01y76e6x6e6w11zzy8252y1252 | |apgcode = xp29_y8ca23z252y24eexcczg8gy28ssy366xg0s4z01y76e6x6e6w11zzy8252y1252 | ||
|pentadecathlonid = 54P29.1 | |pentadecathlonid = 54P29.1 | ||
|viewerconfig = #C [[ GPS 5 ZOOM 10 LOOP 29 ]] | |||
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'''Pre-pulsar shuttle 29''' (or '''prime'''{{citation needed}}) is a [[period]] [[:Category:Oscillators with period 29|29]] [[shuttle]] [[oscillator]] discovered by [[David Buckingham]] on August 2, [[:Category:patterns_found_in_1980|1980]],<ref>{{CiteHickersonOscillators|accessdate=June 16, 2009}}</ref> making it the first oscillator of that period to be found. In terms of its [[:Category:patterns_with_54_cells|54]] [[cell]]s it is the smallest known period 29 oscillator.<ref>{{cite web|url=http://www.pentadecathlon.com/objects/class2/class2.php?part=3 |title=Class 2 Objects Catalog |accessdate=June 10, 2009}}</ref> The oscillator works by combining the 15-generation, two-[[tub]] pre-pulsar shuttle mechanism used in [[Eureka]] with a 14-generation pre-pulsar shuttle mechanism. [[hassle|Hassling]] pre-pulsars in this way was the only known way of constructing period 29 oscillators until the discovery of the [[p29 traffic-farm hassler]], and some variations of this shuttle are shown below. In September [[:Category:patterns found in 1994|1994]] [[Bill Gosper]] found that two copies of pre-pulsar shuttle 29 could be used to hassle a [[pentadecathlon]]. Gosper used it to construct the [[p58 toadsucker]]. | '''Pre-pulsar shuttle 29''' (or '''prime'''{{citation needed}}) is a [[period]] [[:Category:Oscillators with period 29|29]] [[shuttle]] [[oscillator]] discovered by [[David Buckingham]] on August 2, [[:Category:patterns_found_in_1980|1980]],<ref>{{CiteHickersonOscillators|accessdate=June 16, 2009}}</ref> making it the first oscillator of that period to be found. In terms of its [[:Category:patterns_with_54_cells|54]] [[cell]]s it is the smallest known period 29 oscillator.<ref>{{cite web|url=http://www.pentadecathlon.com/objects/class2/class2.php?part=3 |title=Class 2 Objects Catalog |accessdate=June 10, 2009}}</ref> The oscillator works by combining the 15-generation, two-[[tub]] pre-pulsar shuttle mechanism used in [[Eureka]] with a 14-generation pre-pulsar shuttle mechanism. [[hassle|Hassling]] pre-pulsars in this way was the only known way of constructing period 29 oscillators until the discovery of the [[p29 traffic-farm hassler]], and some variations of this shuttle are shown below. In September [[:Category:patterns found in 1994|1994]] [[Bill Gosper]] found that two copies of pre-pulsar shuttle 29 could be used to hassle a [[pentadecathlon]]. Gosper used it to construct the [[p58 toadsucker]]. | ||
Revision as of 19:53, 7 July 2019
| Pre-pulsar shuttle 29 | |||||||||
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| Pattern type | Oscillator | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Oscillator type | Shuttle | ||||||||
| Number of cells | 54 | ||||||||
| Bounding box | 28 × 28 | ||||||||
| Period | 29 | ||||||||
| Mod | 29 | ||||||||
| Heat | 41.5 | ||||||||
| Volatility | 0.90 | ||||||||
| Strict volatility | 0.90 | ||||||||
| Discovered by | David Buckingham | ||||||||
| Year of discovery | 1980 | ||||||||
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Pre-pulsar shuttle 29 (or prime[citation needed]) is a period 29 shuttle oscillator discovered by David Buckingham on August 2, 1980,[1] making it the first oscillator of that period to be found. In terms of its 54 cells it is the smallest known period 29 oscillator.[2] The oscillator works by combining the 15-generation, two-tub pre-pulsar shuttle mechanism used in Eureka with a 14-generation pre-pulsar shuttle mechanism. Hassling pre-pulsars in this way was the only known way of constructing period 29 oscillators until the discovery of the p29 traffic-farm hassler, and some variations of this shuttle are shown below. In September 1994 Bill Gosper found that two copies of pre-pulsar shuttle 29 could be used to hassle a pentadecathlon. Gosper used it to construct the p58 toadsucker.
A 42-glider synthesis is known for a variant of this oscillator, 56P29, which is shown below.[3]
Image gallery
 Generation 4 reveals two pre-pulsars (black) being hassled by a 15-generation mechanism (green) and a 14-generation mechanism (red). |
See also
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on June 16, 2009.
- ↑ "Class 2 Objects Catalog". Retrieved on June 10, 2009.
- ↑ Adam P. Goucher. "xp29_wgg0s4w255202552w4s0ggz320f811w4r4x4r4w118f023zzy4252y1252". Catagolue. Retrieved on June 6, 2019.
External links
- 54P29.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 54 cells
- Periodic objects with minimum population 54
- Patterns with 54 cells
- Patterns found by David Buckingham
- Patterns found in 1980
- Patterns that can be constructed with 31 gliders
- Oscillators
- Shuttles
- Oscillators with period 29
- Prime-period oscillators
- Oscillators with mod 29
- Oscillators with heat 41
- Oscillators with volatility 0.90
- Oscillators with strict volatility 0.90
- Patterns with bilateral diagonal symmetry
- Sparkers
- Sparkers with period 29
- Strong sparkers
- Pre-pulsar shuttle oscillators