Difference between revisions of "Pre-pulsar shuttle 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]].
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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]].
  
 
==Image gallery==
 
==Image gallery==

Revision as of 15:55, 19 May 2019

Pre-pulsar shuttle 29
x = 18, y = 27, rule = B3/S23 11b2o$11bo$13bo$9b5o$9bo$12b4o$12bo2bo2$bo$obo6b3o4bo$bo7bobo3bobo$9b 3o3bobo$16bo2$16bo$9b3o3bobo$bo7bobo3bobo$obo6b3o4bo$bo2$12bo2bo$12b4o $9bo$9b5o$13bo$11bo$11b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]]
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

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.

Image gallery

Generation 4 reveals two pre-pulsars (black) being hassled by a 15-generation mechanism (green) and a 14-generation mechanism (red).
A slightly larger version of this oscillator, 56P29, with just one pre-pulsar (black) and an alternate 14-generation stabilization (red)
RLE: here
A much larger version of this oscillator with four pre-pulsars
RLE: here

See also

References

  1. Dean Hickerson's oscillator stamp collection. Retrieved on June 16, 2009.
  2. "Class 2 Objects Catalog". Retrieved on June 10, 2009.

External links

  • 54P29.1 at Heinrich Koenig's Game of Life Object Catalogs