Quad: Difference between revisions

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{{Oscillator|p=2|c=16|bx=6|by=6|h=8|name=Quad|pname=quad|discoverer=Robert Kraus|discoveryear=1971|life105=true|life106=true|plaintext=true|rle=true|animated=true}}
{{Oscillator
'''Quad''' is a [[period]] [[:Category:Oscillators with period 2|2]] [[oscillator]] and [[babbling brook]] that was found in April [[:Category:Patterns found in 1971|1971]] by [[:Category:Patterns found by Robert Kraus|Robert Kraus]]. It is the only [[flipper]] that fits inside a 6 × 6 [[bounding box]].
|name            = Quad
|pname            = quad
|f1              = Muttering moat
|family          = Barberpole
|c               = 16
|bx               = 6
|by               = 6
|p                = 2
|m                = 1
|h               = 8
|v                = 0.40
|symmetry        = rk*k
|rotor            = Clock
|discoverer       = Robert Kraus
|discoveryear     = 1971
|rulemin          = B3/S23
|rulemax          = B35678/S02345678
|rulespecial      = [[Conway's Game of Life|Conway Life]], [[HighLife]]
|isorulemin      = B3y/S2ae3n
|isorulemax      = B1e2cin34-r5678/S01e2345678
|synthesis        = 8
|synthesisRLE    = true
|plaintext       = true
|rle             = true
|animated         = true
|viewerconfig    = #C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]
|apgcode          = xp2_j5g29jz11w11
|pentadecathlonid = 16P2.19
}}
'''Quad''' (or '''barberpole intersection'''<ref>{{LinkCallahan|glossary.html|patternname=Conway's Life Glossary}}</ref>) is a {{period|2}} [[oscillator]] and [[muttering moat]] that was found in April {{year|1971}} by [[Robert Kraus]].<ref>{{CiteHickersonOscillators|accessdate=March 14, 2020}}</ref> It has the same rotor as the [[clock]]. It and [[mold]] are the only [[flipper (oscillator)|flipper]]s that fit inside a {{times|6|6}} [[bounding box]]; however, mold is period 4.


==External links==
This oscillator first occurred [[natural]]ly on December 28, {{year|2015}}, in a [[soup]] submitted to [[Catagolue]] by [[Adam P. Goucher]].
[http://www.argentum.freeserve.co.uk/lex_q.htm#quad Quad] at the Life Lexicon
A {{gliders|12}} [[Glider synthesis|synthesis]] was constructed the day following its occurrence by [[Tanner Jacobi]].<ref name="post26291" />
 
Information on this oscillator's [[List of common oscillators|natural occurrence with respect to other naturally-occurring patterns]] is currently unknown.
 
== Formation ==
Despite having fourfold [[symmetry]], quads typically form via twofold symmetry only. As shown below, there are two [[lumps of muck]] in the center, and the two outside objects shown can be anything with the same front two rows that does not interfere later.
 
{{EmbedViewer
|pname        = quadpredecessor
|position    = center
|viewerconfig = #C [[ GPS 4 THUMBSIZE 2 ]]
|caption      = Quad predecessor
|style        = width:300px;
}}
 
== See also ==
* [[Skewed quad]]
* [[Barberpole]], which has a similar [[rotor]].
 
== References ==
<references>
<ref name="post26291">{{LinkForumThread
|format = ref
|title  = Re: Soup search results
|p      = 26291
|author = Tanner Jacobi
|date  = December 29, 2015
}}</ref>
</references>
 
== External links ==
* {{LinkLexicon|lex_q.htm#quad}}
* {{LinkCatagolue|xp2_j5g29jz11w11}}
* {{LinkNiemiec|p2.htm#p2-16|The 98 sixteen-bit period 2 oscillators|rle=16/16qd.rle}}
* {{LinkPentadecathlonObject|16P2.19}}
 
{{natural}}
 
__NOTOC__

Latest revision as of 12:40, 7 August 2024

Quad
2o2b2o$obo2bo$4bo$bo$o2bobo$2o2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]
View animated image
View static image
Pattern type Oscillator
Oscillator type Muttering moat
Family Barberpole
Number of cells 16
Bounding box 6 × 6
Period 2 (mod: 1)
Heat 8
Volatility 0.40 | 0.40
Kinetic symmetry rk*k
Rotor type Clock
Discovered by Robert Kraus
Year of discovery 1971

Quad (or barberpole intersection[1]) is a period-2 oscillator and muttering moat that was found in April 1971 by Robert Kraus.[2] It has the same rotor as the clock. It and mold are the only flippers that fit inside a 6 × 6 bounding box; however, mold is period 4.

This oscillator first occurred naturally on December 28, 2015, in a soup submitted to Catagolue by Adam P. Goucher. A 12-glider synthesis was constructed the day following its occurrence by Tanner Jacobi.[3]

Information on this oscillator's natural occurrence with respect to other naturally-occurring patterns is currently unknown.

Formation

Despite having fourfold symmetry, quads typically form via twofold symmetry only. As shown below, there are two lumps of muck in the center, and the two outside objects shown can be anything with the same front two rows that does not interfere later.

x = 19, y = 6, rule = B3/S23 9b3o$bo7bo2b2o$3ob3o2b2o2bo3bo$4bo2b2o2b3ob2obo$4b2o2bo7bobo$6b3o8bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]
Quad predecessor
(click above to open LifeViewer)
RLE: here Plaintext: here

See also

References

  1. ↑ Conway's Life Glossary at Paul Callahan's Page of Conway's Life Miscellany
  2. ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  3. ↑ Tanner Jacobi (December 29, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums


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