Pi orbital: Difference between revisions
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Revision as of 20:52, 21 April 2021
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| Pattern type | Oscillator | ||||||||
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| Number of cells | 305 | ||||||||
| Bounding box | 59 × 59 | ||||||||
| Period | 168 (mod: 42) | ||||||||
| Heat | 270.7 | ||||||||
| Volatility | 0.91 | 0.61 | ||||||||
| Kinetic symmetry | Unspecified | ||||||||
| Discovered by | Noam Elkies | ||||||||
| Year of discovery | 1995 | ||||||||
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Pi orbital is a period-168 oscillator that was found by Noam Elkies on August 22, 1995.[1] It works by using four crowns and four blocks to turn a pi heptomino ninety degrees every 42 generations. A second pi heptomino can be inserted to reduce the period to 84. On March 26, 2009 Nicolay Beluchenko found a relatively small period 12 sparker that could replace the crowns. On April 6, 2010 Matthias Merzenich discovered the Blocked p4-4 period 4 oscillator that also supports the oscillator.
In December 2020, GUYTU6J posted the final step of a synthesis of this oscillator, specifically the p12-supported variant.[2]
Image gallery
 RLE: here |
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See also
References
- ↑ Jason Summers' jslife pattern collection. Retrieved on March 14, 2020.
- ↑ GUYTU6J (December 27, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
External links
- Pi orbital at the Life Lexicon
- Pi orbital at Adam P. Goucher's Catagolue (extended)
Categories:
- Patterns
- Oscillators with between 300 and 399 cells
- Periodic objects with minimum population between 300 and 399
- Patterns with between 300 and 399 cells
- Patterns found by Noam Elkies
- Patterns found in 1995
- Outer-totalistically endemic patterns
- Oscillators
- Oscillators with period 168
- Oscillators with mod 42
- Oscillators with heat between 200 and 299
- Oscillators with volatility 0.91
- Oscillators with strict volatility 0.61
- Non-flipping oscillators that turn 90 degrees
- Pi-heptomino hasslers