Pond
| Pond | |||||||||||
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| Pattern type | Strict still life | ||||||||||
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| Number of cells | 8 | ||||||||||
| Bounding box | 4 × 4 | ||||||||||
| Frequency class | 5.0 | ||||||||||
| Discovered by | JHC group | ||||||||||
| Year of discovery | 1970 | ||||||||||
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Pond is an 8-cell still life discovered by the JHC group in 1970.[1] It is the smallest lake, followed by the 24-cell lake 2.
It can be seen as containing a photonegative block.
Commonness
Pond is the seventh most common still life on Adam P. Goucher's Catagolue, being less common than tub but more common than long boat. Among all still lifes with 8 cells, it is the absolute most common, followed by mango.[2] It is also the ninth most common object overall on Catagolue.
The pond was the sixth most common still life in Achim Flammenkamp's census, being slightly less common than tub and more common than ship.[3] Refer to the ship page for why it ended up being less common than the tub.
Compared to Catagolue's typical 16×16 soups, the pond is 19% more common in 8×8 soups and 7% more common in 10×10 soups.
Occurrence
Many ponds originate from a common predecessor called the prepond. The prepond turns into a pond in 32 Life-like rules, from B3/S23 to B378/S23678, but it dies out in HighLife. Consequently, the pond occurs more than twice as commonly in Game of Life than in HighLife.
| Prepond (click above to open LifeViewer) RLE: here Plaintext: here |
Glider synthesis
There are two 2-glider collisions, one head-on and another perpendicular, that produce a clean pond. A pond can also be made by colliding a glider into a blinker.
See also
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on June 18, 2009.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on August 25, 2022.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
External links
- Pond at the Life Lexicon
- Pond at Adam P. Goucher's Catagolue
- The 9 eight-bit still-lifes at Mark D. Niemiec's Life Page
- Patterns
- Patterns with Catagolue frequency class 5
- Natural periodic objects
- Periodic objects with minimum population 8
- Patterns with 8 cells
- Patterns found by JHC group
- Patterns found in 1970
- Patterns that can be constructed with 2 gliders
- Still lifes
- Strict still lifes
- Strict still lifes with 8 cells
- Patterns with complete square symmetry