Long shillelagh
Long shillelagh | |||||||||||
View static image | |||||||||||
Pattern type | Strict still life | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Number of cells | 9 | ||||||||||
Bounding box | 6×3 | ||||||||||
Frequency class | 20.2 | ||||||||||
Discovered by | Robert Wainwright | ||||||||||
Year of discovery | 1972 | ||||||||||
| |||||||||||
| |||||||||||
| |||||||||||
|
Long shillelagh is 9-cell still life. It is the long extension of shillelagh. It was found by Robert Wainwright in 1972, and was one of the last 9-bit still lifes to be reported.[1]
Two copies of this still life can position themselves in such a way so that they share two-fold C2_4 rotational symmetry. In this orientation, they can be considered one strict still life and fit in a 6×6 bounding box, giving the resultant still life the highest density of all still lifes fitting inside such a bounding box.
Commonness
Long shillelagh is the sixty-second most common still life in Achim Flammenkamp's census, less common than the tub with nine but more common than trans-bun and wing.[2] It is also the seventy-fourth most common object on Adam P. Goucher's Catagolue.[3]
Glider synthesis
All strict still lifes with a population of 20 or fewer cells, as well as all oscillators and spaceships with 16 or fewer cells, are known to be glider-constructible. A glider synthesis of this object can be found in the infobox to the right.
Gallery
Two long shillelaghs attached to form a maximum density 6×6 still life (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here |
References
- ↑ Robert Wainwright (September 1972). Lifeline, vol 5, pages 4, 6.
- ↑ 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 June 24, 2016.
External links
- Long shillelagh at the Life Lexicon
- The 10 nine-bit still-lifes at Mark D. Niemiec's Life Page
- Patterns
- Patterns with Catagolue frequency class 20
- Natural periodic objects
- Periodic objects with minimum population 9
- Patterns with 9 cells
- Patterns found by Robert Wainwright
- Patterns found in 1972
- Patterns that can be constructed with 4 gliders
- Still lifes
- Strict still lifes
- Strict still lifes with 9 cells
- Diagonal line stabilisations