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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|pentadecathlonid = 9.8 | |pentadecathlonid = 9.8 | ||
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'''Long hook with tail''' is a {{cells|9}} | '''Long hook with tail''' is a {{cells|9|text=9-cell}} [[still life]]. It was found by [[Robert Wainwright]] in {{year|1972}}, and was one of the last 9-bit still lifes to be reported.<ref>{{CiteLifeline|vol=5|pages=pages 4, 6}}</ref> | ||
== [[List of common still lifes| | == Commonness == | ||
It is the 129th [[List of common still lifes|most common still life]] on [[Adam P. Goucher]]'s [[Catagolue]]. Of the ten 9-cell still lifes, it is the second rarest. | |||
==Catalysis== | == 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]] [[Herschel loop|loop]] [[oscillator]]s to [[period]]s of {{period|57|brief}}, {{period|58|brief}}, {{period|59|brief}}, and {{period|60|brief}}. For more of the usage of this catalyst and other block-replacement catalysts, see [[Tutorials/Catalyses#Block_replacements]]. | 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]] [[Herschel loop|loop]] [[oscillator]]s to [[period]]s of {{period|57|brief}}, {{period|58|brief}}, {{period|59|brief}}, and {{period|60|brief}}. For more of the usage of this catalyst and other block-replacement catalysts, see [[Tutorials/Catalyses#Block_replacements]]. | ||
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== | == 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. | 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. | ||
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== External links == | == External links == | ||
{{LinkCatagolue|xs9_178426}} | * {{LinkCatagolue|xs9_178426}} | ||
{{LinkNiemiec|p1.htm#p1-9| | * {{LinkNiemiec|p1.htm#p1-9|The 10 nine-bit still-lifes|rle=0/9-8.rle}} | ||
* {{LinkPentadecathlonObject|id=9.8}} | |||
[[Category:Diagonal line stabilisations]] | [[Category:Diagonal line stabilisations]] | ||
Revision as of 15:20, 3 November 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]
Commonness
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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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
References
- ↑ Robert Wainwright (September 1972). Lifeline, vol 5, pages 4, 6.
External links
- Long hook with tail at Adam P. Goucher's Catagolue
- The 10 nine-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 0/9-8.rle)
- 9.8 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- 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