Long hook with tail: Difference between revisions
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Carson Cheng (talk | contribs) One of the most expensive still lifes of 9 bits and below |
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== [[Glider synthesis]] == | == [[Glider synthesis]] == | ||
The long hook with tail is known for being more difficult to synthesize than other still lifes of this size. Of the 31 strict still lifes of 9 bits and below, only 2, including the long hook with tail, costs 5 gliders, which is the maximum glider cost in this group of small still lifes. | |||
== See also == | == See also == | ||
Revision as of 23:57, 10 September 2022
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| Pattern type | Strict still life | ||||||||
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| Number of cells | 9 | ||||||||
| Bounding box | 6 × 4 | ||||||||
| Frequency class | 23.1 | ||||||||
| Static symmetry | Unspecified | ||||||||
| Discovered by | Robert Wainwright | ||||||||
| Year of discovery | 1972 | ||||||||
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Long hook with tail is a 9-cell still life. It was found by Robert Wainwright in 1972, and was one of the last 9-bit still lifes to be reported.[1]
It is the 129th most common still life on Adam P. Goucher's Catagolue. Of the ten 9-cell still lifes, it is the second rarest.
Catalysis
Long hook with tail can sometimes be used as a block catalyst. Since it is a rock during catalysis, it can be used when the block gets destroyed by nearby junk while undergoing catalysis. An example can be seen in a high-clearance variant of the eater 5 that allows the compression of Herschel loop oscillators to periods of 57, 58, 59, and 60. For more of the usage of this catalyst and other block-replacement catalysts, see Tutorials/Catalyses#Block_replacements.
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The long hook with tail is known for being more difficult to synthesize than other still lifes of this size. Of the 31 strict still lifes of 9 bits and below, only 2, including the long hook with tail, costs 5 gliders, which is the maximum glider cost in this group of small still lifes.
See also
References
- ↑ Robert Wainwright (September 1972). Lifeline, vol 5, pages 4, 6.
External links
- The 10 nine-bit still-lifes at Mark D. Niemiec's Life Page
- Patterns
- Patterns with Catagolue frequency class 23
- 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 5 gliders
- Still lifes
- Strict still lifes
- Strict still lifes with 9 cells
- Diagonal line stabilisations
- Catalysts