Difference between revisions of "Four boats"
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{{Oscillator | |||
'''Four boats''' (or '''hourglass'''<ref>{{cite web|url=http:// | |name = Four boats | ||
|pname = 4boats | |||
|f1 = Babbling brook | |||
|f2 = Billiard table | |||
|c = 16 | |||
|bx = 8 | |||
|by = 8 | |||
|fc = 33.5 | |||
|p = 2 | |||
|m = 2 | |||
|h = 4 | |||
|v = 0.20 | |||
|rotor = Diagonal on-off | |||
|rulemin = B3/S23 | |||
|rulemax = B3678/S01235678 | |||
|rulespecial = [[Conway's Game of Life|Conway Life]], [[HighLife]] | |||
|isorulemin = B3n/S2ckn3ckn | |||
|isorulemax = B2cik34-ejw5-c678/S01234-y5678 | |||
|synthesis = 6 | |||
|synthesisRLE = true | |||
|plaintext = true | |||
|rle = true | |||
|animated = true | |||
|viewerconfig = #C [[ GPS 2 THUMBSIZE 2 ]] | |||
|apgcode = xp2_8ki1688gzx3421 | |||
|pentadecathlonid = 16P2.98 | |||
}} | |||
'''Four boats''' (or '''hourglass'''<ref>{{cite web|url=http://codercontest.com/mniemiec/objname.htm#H|title=Life objects sorted by name|author=Mark D. Niemiec|accessdate=April 30, 2009}}</ref>) is a [[period]] [[:Category:Oscillators with period 2|2]] [[oscillator]], which is composed of four [[boat]]s in one of its [[phase]]s. It has two [[diagonal on-off]] [[rotor]]s enclosed by a common [[stator]]. While the two rotors are not connected, the stability of the stator still requires them to be in the same phase. It is the most common [[billiard table]] osciillator that qualifies under the most strict definition of the term; that the rotor has to be completely surrounded by the stator in all orthogonal directions. | |||
==Image gallery== | ==Image gallery== | ||
{| | {| | ||
|- | |- | ||
| [[Image:4boatsorigin.png|framed|The | | [[Image:4boatsorigin.png|framed|The on phase of this oscillator, the one which led to naming it four boats.]] | ||
|} | |} | ||
==See also== | ==See also== | ||
*[[ | *[[Harbor]] | ||
*[[O quad-loaf]] | |||
*[[Cyclic]] | |||
==References== | ==References== | ||
| Line 15: | Line 44: | ||
==External links== | ==External links== | ||
{{LinkLexicon|lex_1.htm# | {{LinkLexicon|lex_1.htm#a-4boats|name=4 boats}} | ||
{{LinkCatagolue|xp2_8ki1688gzx3421}} | |||
{{LinkPentadecathlonObject|16P2.98}} | |||
{{Symmetry|diagonal4}} | |||
__NOTOC__ | |||
Revision as of 12:08, 4 July 2019
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| Pattern type | Oscillator | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Oscillator type | Babbling brook | ||||||||
| Billiard table | |||||||||
| Number of cells | 16 | ||||||||
| Bounding box | 8 × 8 | ||||||||
| Frequency class | 33.5 | ||||||||
| Period | 2 | ||||||||
| Mod | 2 | ||||||||
| Heat | 4 | ||||||||
| Volatility | 0.20 | ||||||||
| Strict volatility | 0.20 | ||||||||
| Rotor type | Diagonal on-off | ||||||||
| Discovered by | Unknown | ||||||||
| Year of discovery | Unknown | ||||||||
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Four boats (or hourglass[1]) is a period 2 oscillator, which is composed of four boats in one of its phases. It has two diagonal on-off rotors enclosed by a common stator. While the two rotors are not connected, the stability of the stator still requires them to be in the same phase. It is the most common billiard table osciillator that qualifies under the most strict definition of the term; that the rotor has to be completely surrounded by the stator in all orthogonal directions.
Image gallery
File:4boatsorigin.png The on phase of this oscillator, the one which led to naming it four boats. |
See also
References
- ↑ Mark D. Niemiec. "Life objects sorted by name". Retrieved on April 30, 2009.
External links
- 4 boats at the Life Lexicon
- 16P2.98 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Patterns with Catagolue frequency class 33
- Natural periodic objects
- Oscillators with 16 cells
- Periodic objects with minimum population 16
- Patterns with 16 cells
- Patterns that can be constructed with 6 gliders
- Oscillators
- Babbling brooks
- Billiard tables
- Oscillators with period 2
- Oscillators with mod 2
- Oscillators with heat 4
- Oscillators with volatility 0.20
- Oscillators with strict volatility 0.20
- Oscillators with rotor Diagonal on-off
- Patterns with rectangular diagonal symmetry