p44 pi-heptomino hassler
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| p44 pi-heptomino hassler | |||||||||||
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| Pattern type | Oscillator | ||||||||||
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| Number of cells | 102 | ||||||||||
| Bounding box | 31×44 | ||||||||||
| Period | 44 | ||||||||||
| Mod | 44 | ||||||||||
| Heat | 93.3 | ||||||||||
| Volatility | 0.91 | ||||||||||
| Strict volatility | 0.80 | ||||||||||
| Discovered by | David Buckingham | ||||||||||
| Year of discovery | 1992 | ||||||||||
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P44 pi-heptomino hassler is a period-44 oscillator discovered by David Buckingham on April 2, 1992.[1] It was improved to the form shown here by Noam Elkies in April 1996. The oscillator consists of two pi-heptominos being hassled by two heavyweight emulators and four blocks.
Buckingham used two copies of this oscillator to make the first period 44 glider gun. This became obsolete in October 1996 when Buckingham found a gun that only used one copy of the oscillator.
In 1994 Dean Hickerson found a way to double the oscillator's period by adding two molds, creating the first period 88 oscillator. David Buckingham also found a way to triple the period before August 1994.
Image gallery
 Buckingham's original period 44 gun and its subsequent improvement, as well as the small period-44 MWSS gun found by Dietrich Leithner Download RLE: click here |
See also
References
External links
Categories:
- Patterns
- Oscillators with 102 cells
- Patterns with 102 cells
- Patterns found by David Buckingham
- Patterns found in 1992
- Patterns that can be constructed with 67 gliders
- Outer-totalistically endemic patterns
- Oscillators
- Periodic objects with minimum population 102
- Oscillators with period 44
- Oscillators with mod 44
- Oscillators with heat 93
- Oscillators with volatility 0.91
- Oscillators with strict volatility 0.80
- Patterns with bilateral orthogonal symmetry
