Difference between revisions of "Four boats"

From LifeWiki
Jump to navigation Jump to search
m (Typo)
(36 intermediate revisions by 11 users not shown)
Line 1: Line 1:
{{Oscillator|name=Four Boats|pname=4boats|p=2|c=20, 16|discoverer=Unknown||discoveryear=Unknown}}
{{Oscillator
'''Four boats''' is a [[period]] [[List of oscillators with period 2|2]] [[oscillator]] composed of four [[boats]].
|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:4boatsorigin.png|framed|The on phase of this oscillator, the one which led to naming it four boats.]]
|}


==See also==
==See also==
*[[Boat]]
*[[Harbor]]
*[[List of oscillators with period 2]]
*[[O quad-loaf]]
*[[Cyclic]]
 
==References==
<references />


==External links==
==External links==
[http://www.argentum.freeserve.co.uk/lex_1.htm#a4boats Four Boats] at the Life Lexicon
{{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

Four boats
Four boats image
View animated image
View static image
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

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

  1. ↑ Mark D. Niemiec. "Life objects sorted by name". Retrieved on April 30, 2009.

External links


Retrieved from "https://conwaylife.com/w/index.php?title=Four_boats&oldid=62254"