Hook with tail
| Hook with tail | |||||||||
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| Pattern type | Strict still life | ||||||||
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| Number of cells | 8 | ||||||||
| Bounding box | 5 × 4 | ||||||||
| Frequency class | 20.5 | ||||||||
| Discovered by | Unknown | ||||||||
| Year of discovery | 1971 | ||||||||
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Hook with tail (or snake eater) is an 8-cell still life. Despite it being reported on Lifeline early on,[1] it was for a long time the smallest still life without a well-established name.
This still life is comprised of the normally unstable hook with a normally unstable tail attached.
Commonness
- Main article: List of common still lifes
Hook with tail is the sixty-ninth most common still life in Achim Flammenkamp's census, being less common than loaf siamese loaf but more common than long integral[2]
It is the 69th most common still life on Adam P. Goucher's Catagolue, being less common than cis-bookend and bun but more common than loaf siamese loaf. It is the rarest still life with 8 cells, being less common than very long snake.[3]
The octo3obj database contains six collisions between a glider and a small constellation where the final pattern contains a hook with tail (with other junk).
Glider synthesis
On April 29, 2007 Dean Hickerson found a 4-glider synthesis of this still life.[4] Several known alternate syntheses can be found in Mark Niemiec's database.[5]
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As a rock
The hook with tail can act as a rock in two ways, one using the tail like snake, the other using the hook as shown below.
| An example of the hook with tail being used as a rock in a period-14 oscillator found by Matthias Merzenich in 2014 (click above to open LifeViewer) RLE: here Plaintext: here |
Hook with tail family
Gallery
| Hitting a hook with tail with a glider in the correct orientation creates a beehive with bend nine plus a boat (click above to open LifeViewer) |
See also
References
- ↑ Robert Wainwright (September 1971). Lifeline, vol 3, page 2.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on November 8, 2009.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on May 5, 2023.
- ↑ 4.0 4.1 Dean Hickerson's 2, 3, and 4-glider syntheses pattern collection
- ↑ The 9 eight-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 0/8ht.rle)
External links
- Hook with tail at the Life Lexicon
- Hook with tail at Adam P. Goucher's Catagolue
- 8.5 at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Patterns with Catagolue frequency class 20
- Natural periodic objects
- Periodic objects with minimum population 8
- Patterns with 8 cells
- Patterns found in 1971
- Patterns that can be constructed with 4 gliders
- Still lifes
- Strict still lifes
- Strict still lifes with 8 cells
- Diagonal line stabilisations
- Catalysts