Cis-block on long bookend
| Cis-block on long bookend | |||||||||
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| Pattern type | Strict still life | ||||||||
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| Number of cells | 12 | ||||||||
| Bounding box | 6 × 5 | ||||||||
| Frequency class | 20.0 | ||||||||
| Discovered by | Robert Wainwright Everett Boyer | ||||||||
| Year of discovery | 1973 | ||||||||
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Cis-block on long bookend is a 12-cell still life composed of a long bookend and a block.
Construction
This still life can be constructed with 4 gliders. Alternate syntheses with five or more gliders can be found in Mark Niemiec's database.[1]
| A 4G synthesis (click above to open LifeViewer) |
Commonness
- Main article: List of common still lifes
Cis-block on long bookend is the fifty-ninth most common still life in Achim Flammenkamp's census, being less common than eater head siamese eater tail but more common than very long snake.[2]
It is the 60th most common still life on Adam P. Goucher's Catagolue, being less common than cis-boat on dock but more common than very long snake. It is the 7th most common still life with 12 cells, being less common than block on cover but more common than boat tie eater tail.[3]
The still life occurs in final patterns of 7 collisions from the octo3obj database, 2 collisions from the octo3g database,[4] and 1 collision from the octohash database[5].
See also
References
- ↑ The 121 twelve-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 12/12-28.rle)
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on May 5, 2023.
- ↑ Headerless RLEs are 15bobo$15b2o$16bo4$o$b2o$2o$5bo$4b2o$4bobo! and bo$2bo$3o5$16bo$17bo$15b3o3$17b3o$19bo$18bo!
- ↑ Headerless RLE: 7b2o$7bobo$8bo2$9b2o$9bobo$9bo$o$3o$3bo$2b2o!
External links
- Cis-block on long bookend at Adam P. Goucher's Catagolue
- 12.33 at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Patterns with Catagolue frequency class 20
- Natural periodic objects
- Periodic objects with minimum population 12
- Patterns with 12 cells
- Patterns found by Robert Wainwright
- Patterns found by Everett Boyer
- Patterns found in 1973
- Patterns that can be constructed with 4 gliders
- Still lifes
- Strict still lifes
- Strict still lifes with 12 cells
- Catalysts