P47 pre-pulsar shuttle
Jump to navigation
Jump to search
| Pre-pulsar shuttle 47 | |||||||||
| View animated image | |||||||||
| View static image | |||||||||
| Pattern type | Oscillator | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Oscillator type | Shuttle | ||||||||
| Number of cells | 84 | ||||||||
| Bounding box | 31 × 30 | ||||||||
| Period | 47 | ||||||||
| Mod | 47 | ||||||||
| Heat | 60.9 | ||||||||
| Volatility | 0.89 | ||||||||
| Strict volatility | 0.89 | ||||||||
| Discovered by | David Buckingham | ||||||||
| Year of discovery | 1982 | ||||||||
| |||||||||
| |||||||||
| |||||||||
Pre-pulsar shuttle 47 is a period-47 shuttle oscillator discovered by David Buckingham on December 5, 1982[1] and was the first oscillator of that period to be discovered. It consists of four tubs, four blinkers, four eater 1s and two blocks hassling two pre-pulsars. Hassling pre-pulsars in manners similar to this had been the only known method of constructing period-47 oscillators until discovery of the snark. In terms of its 84 cells, it is the smallest known period-47 oscillator.
In May 2003 Jason Summers found that sparks from four copies of this oscillator could be used to support a period-47 t-tetromino engine, and in February 2009 Nicolay Beluchenko noticed that this only required two copies of the oscillator,[2] as shown below.
Image gallery
File:Prepulsar47 gen4.png Generation 4 reveals that the objects being hassled are pre-pulsars |
 An extended version of this oscillator, found by Jason Summers and improved by Nicolay Beluchenko Download RLE: click here |
See also
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on June 18, 2009.
- ↑ "New Oscillators". H. Koenig (March 16, 2009). Retrieved on March 28, 2009.
External links
- 84P47.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Oscillators with 84 cells
- Periodic objects with minimum population 84
- Patterns with 84 cells
- Patterns found by David Buckingham
- Patterns found in 1982
- Outer-totalistically endemic patterns
- Oscillators
- Shuttles
- Oscillators with period 47
- Prime-period oscillators
- Oscillators with mod 47
- Oscillators with heat 60
- Oscillators with volatility 0.89
- Oscillators with strict volatility 0.89
- Patterns with rectangular orthogonal symmetry
- Pre-pulsar shuttle oscillators