Pi orbital: Difference between revisions
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m Mod |
m isorule |
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| Line 15: | Line 15: | ||
|rulemax = B3/S23 | |rulemax = B3/S23 | ||
|rulespecial = [[Conway's Game of Life|Conway Life]] | |rulespecial = [[Conway's Game of Life|Conway Life]] | ||
|isorulemin = B3/S23 | |||
|isorulemax = B3/S236ei | |||
|life105 = true | |life105 = true | ||
|life106 = true | |life106 = true | ||
Revision as of 04:37, 13 January 2019
| Pi orbital | |||||||||
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| Pattern type | Oscillator | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 in August 1995. 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.
Image gallery
 RLE: here |
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See also
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