Sidewalk
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| Sidewalk | |||||||||
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| Pattern type | Strict still life | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number of cells | 14 | ||||||||
| Bounding box | 6 × 5 | ||||||||
| Frequency class | 23.6 | ||||||||
| Static symmetry | Unspecified | ||||||||
| Discovered by | Unknown | ||||||||
| Year of discovery | Unknown | ||||||||
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Sidewalk (or pavement) is a 14-cell still life made up of two islands that are by themselves referred to as sides. An individual side can occasionally be useful as an induction coil.
 A side |
Commonness
It is the thirty-sixth most common object on Catagolue in the symmetry the object has (C2_2).
This pattern has occurred naturally in Catagolue's asymmetric censuses, however details of its rarity are currently not known.
Glider synthesis
Peter Raynham found a 4-glider synthesis for the still life in 1973, which is based on a head-to-head collision between two pi-heptominoes.[1]
See also
References
- ↑ Robert Wainwright (June 1973). Lifeline, vol 10, page 2.
External links
- Sidewalk at the Life Lexicon
- Side at the Life Lexicon
- The 619 fourteen-bit still-lifes at Mark D. Niemiec's Life Page
Categories:
- Patterns
- Patterns with Catagolue frequency class 23
- Natural periodic objects
- Periodic objects with minimum population 14
- Patterns with 14 cells
- Patterns that can be constructed with 4 gliders
- Still lifes
- Strict still lifes
- Strict still lifes with 14 cells
- Patterns missing Catagolue rarity reference
- Patterns with 180-degree rotation symmetry