Two eaters
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| Two eaters | |||||||||
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| Pattern type | Oscillator | ||||||||
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| Number of cells | 14 | ||||||||
| Bounding box | 9 × 8 | ||||||||
| Frequency class | 38.8 | ||||||||
| Period | 3 (mod: 3) | ||||||||
| Heat | 4 | ||||||||
| Volatility | 0.33 | 0.33 | ||||||||
| Kinetic symmetry | .e | ||||||||
| Discovered by | Bill Gosper | ||||||||
| Year of discovery | 1971 | ||||||||
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- Not to be confused with four eaters.
Two eaters (or eater eating eater[1]) is a period-3 oscillator that was found by Bill Gosper in September 1971.[2][3] It consists of two eater 1s. It first occurred naturally on August 11, 2015, in a soup submitted to Catagolue by Tanner Jacobi.[4]
On June 1, 2024, Carson Cheng found a 6-glider synthesis.[5][6]
Variants
As the eater 1 reaction can be performed by any still lifes with the same local shape, there are many possible stator variants of this oscillator. Here are all alternate versions up to 18 cells:
| Oscillator | Population | apgcode | Frequency class | Cost in gliders | |
|---|---|---|---|---|---|
|
Eater eating integral | 16 | xp3_31egozy231e8 | 40.5 | 7 |
|
Eater eating tub with nine | 17 | xp3_178c0ggzy11078k8 | unknown | 8 |
|
Eater eating hook with nine | 17 | xp3_321egozy331e8 | unknown | 9 |
|
Eater eating elevener | 18 | xp3_178c0ggzy11074ko | unknown | 8 |
|
Integral eating integral | 18 | xp3_31egozy231ego | unknown | 8 |
|
Eater eating trans-boat with nine | 18 | xp3_178c0ggzy11078ko | unknown | 8 |
|
Eater eating hungry hat | 18 | xp3_8e1egozy331e8 | unknown | 8 |
|
Eater eating eater with cape | 18 | xp3_wgg0c871acz4701 | unknown | 9 |
|
Eater eating cis-boat with nine | 18 | xp3_178c0ggzy11078kc | unknown | 9 |
|
Eater eating carrier siamese eater tail | 18 | xp3_32aczy0354c826 | [No natural occurrences] |
9 |
|
Eater eating eater tail siamese snake | 18 | xp3_32132aczy3354c | [No natural occurrences] |
8 |
|
Eater eating long hook with nine | 18 | xp3_6421egozy431e8 | [No natural occurrences] |
8 |
See also
- Other period-3 eater pair oscillators
- Other periods
- Comprised of other eaters
References
- ↑ Life Objects Sorted by Name (E) at Mark D. Niemiec's Life Page
- ↑ Robert Wainwright (September 1971). Lifeline, vol 3, page 5.
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ gameoflifeboy (August 11, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Carson Cheng (June 1, 2024). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#6995600157) (June 1, 2024). Job triggered by Adam P. Goucher at GitLab Catagolue project.
External links
- Two eaters at the Life Lexicon
- Two eaters at Adam P. Goucher's Catagolue
- The 1 fourteen-bit period 3 oscillator at Mark D. Niemiec's Life Page (download pattern file: 14/14eet.rle)
- 14P3.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Patterns with Catagolue frequency class 38
- Natural periodic objects
- Oscillators with 14 cells
- Periodic objects with minimum population 14
- Patterns with 14 cells
- Patterns found by Bill Gosper
- Patterns found in 1971
- Patterns that can be constructed with 6 gliders
- Oscillators
- Oscillators with period 3
- Oscillators with mod 3
- Oscillators with heat 4
- Oscillators with volatility 0.33
- Oscillators with strict volatility 0.33
- Oscillators with .e symmetry