Difference between revisions of "Spiral"
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{{Stilllife|name=Spiral|pname=spiral|bx=7|by=7 | {{Stilllife | ||
'''Spiral''' (or '''tub with four tails''') is | |name = Spiral | ||
|pname = spiral | |||
|c = 20 | |||
|bx = 7 | |||
|by = 7 | |||
|discoverer = Robert Wainwright | |||
|discoveryear = 1971 | |||
|rulemin = B/S23 | |||
|rulemax = B35678/S012345678 | |||
|rulespecial = [[Conway's Game of Life|Conway Life]], [[HighLife]] | |||
|isorulemin = B/S2aek3cr | |||
|isorulemax = B2-ae34-aejn5678/S012345678 | |||
|synthesis = 10 | |||
|plaintext = true | |||
|rle = true | |||
|apgcode = xs20_178kai3z311w32 | |||
|niemiecid = 20.22049 | |||
|pentadecathlonid = 20.24124 | |||
}} | |||
'''Spiral''' (or '''tub with four tails''') is one of the two smallest [[still life]]s with four-fold rotational (C4) symmetry. It consists of a [[tub]] and four [[tail]]s. It was found by [[Robert Wainwright]] in {{year|1971}}.<ref>{{citeLifeline|vol=2}}</ref><ref>{{CiteHickersonOscillators|accessdate=March 14, 2020}}</ref> | |||
==See also== | ==See also== | ||
*[[Tub with tail]] | *[[Tub with tail]] | ||
==References== | |||
<references /> | |||
==External links== | ==External links== | ||
{{LinkWeisstein|Spiral.html}} | |||
{{LinkLexicon|lex_s.htm#spiral}} | |||
{{LinkCatagolue|xs20_178kai3z311w32}} | |||
{{LinkNiemiec|bits-20.htm|patternname=Twenty-Bit Life Objects}} | |||
{{Symmetry|90degree}} | |||
{{seminatural}} | |||
Revision as of 14:16, 14 March 2020
| Spiral | |||||||||
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| Pattern type | Strict still life | ||||||||
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| Number of cells | 20 | ||||||||
| Bounding box | 7 × 7 | ||||||||
| Discovered by | Robert Wainwright | ||||||||
| Year of discovery | 1971 | ||||||||
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Spiral (or tub with four tails) is one of the two smallest still lifes with four-fold rotational (C4) symmetry. It consists of a tub and four tails. It was found by Robert Wainwright in 1971.[1][2]
See also
References
- ↑ Robert Wainwright (June 1971). Lifeline, vol 2.
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
External links
- Spiral at the Life Lexicon
- Twenty-Bit Life Objects at Mark D. Niemiec's Life Page
Categories:
- Patterns
- Periodic objects with minimum population 20
- Patterns with 20 cells
- Patterns found by Robert Wainwright
- Patterns found in 1971
- Patterns that can be constructed with 10 gliders
- Still lifes
- Strict still lifes
- Strict still lifes with 20 cells
- Patterns with 90-degree rotation symmetry
- Semi-natural periodic objects