Glider-producing switch engine: Difference between revisions

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Because of its easy construction (see its predecessors below), it has appeared in some superlinear growth patterns including [[mosquito 3]].
Because of its easy construction (see its predecessors below), it has appeared in some superlinear growth patterns including [[mosquito 3]].


==Commonness==
== Occurrence ==
The glider-producing switch engine is the second most [[common]] naturally-occurring pattern that exhibits [[infinite growth]], the most common being the [[block-laying switch engine]]. It is also the ninety-first most common object on [[Adam P. Goucher]]'s [[Catagolue]].<ref>{{citeCatagolueStats|June 24, 2016}}</ref>
The glider-producing switch engine is the second most [[common]] naturally-occurring pattern that exhibits [[infinite growth]], the most common being the [[block-laying switch engine]]. It is also the ninety-first most common object on [[Adam P. Goucher]]'s [[Catagolue]].<ref>{{citeCatagolueStats|June 24, 2016}}</ref>


==Time bomb==
==Time bomb==
The '''time bomb''' is a 17-[[cell]] [[pattern]] found by [[Douglas G. Petrie]] that evolves into a glider-producing switch engine.<ref>{{CiteLifeline|vol=10|pages=page 3}}</ref><ref>{{CiteLexicon|file=lex_t.htm#timebomb|name=Time bomb|accessdate=May 16, 2009}}</ref>
The '''time bomb''' is a 17-cell [[pattern]] found by [[Douglas G. Petrie]] that evolves into a glider-producing switch engine.<ref>{{CiteLifeline|vol=10|pages=page 3}}</ref><ref>{{CiteLexicon|file=lex_t.htm#timebomb|name=Time bomb|accessdate=May 16, 2009}}</ref>


==Synthesis==
{{EmbedViewer
Although a clean synthesis of the glider-producing switch engine requires 4 gliders, [[Michael Simkin]] found a 3-glider collision in October {{year|2014}} which includes the puffer in its [[ash]].<ref name="post13988" /> This collision has the minimum number of gliders necessary to exhibit infinite growth, and is the only known 3-glider collision to do so.
|pname        = timebomb
|viewerconfig = #C [[ THUMBSIZE 2 ]]
|position    = center
|caption      = Time bomb
|style        = width:300px;
}}


==Gallery==
== Construction ==
{|
{{EmbedViewer
|-
|pname       = gliderproducingswitchenginepredecessor2
||{{EmbedViewer
|pname = timebomb
|position    = center
|viewerconfig = #C [[ THUMBSIZE 2 ]]
|viewerconfig = #C [[ THUMBSIZE 2 ]]
|caption      = Time bomb<br />
}}
|{{EmbedViewer
|pname = gliderproducingswitchenginepredecessor2
|position    = center
|position    = center
|viewerconfig = #C [[ THUMBSIZE 2 ]]
|caption      = Another simple predecessor of the glider-producing switch engine
|caption      = Another simple predecessor of the glider-producing switch engine<br />
|style        = width:300px;
}}
}}
|-
|[[Image:Gliderproducingswitchengine_debris.png|thumb|346px|left|The debris left behind by the glider-producing switch engine]]
|}


Although a clean synthesis of the glider-producing switch engine requires 4 gliders, [[Michael Simkin]] found a 3-glider collision in October {{year|2014}} which includes the puffer in its [[ash]].<ref name="post13988" /> This collision has the minimum number of gliders necessary to exhibit infinite growth, and is the only known 3-glider collision to do so.
There is a list of known 4-glider syntheses with the condition that all escaping gliders are forward-facing.<ref name="post153472" />
==Gallery==
[[Image:Gliderproducingswitchengine_debris.png|thumb|346px|center|The debris left behind by the glider-producing switch engine]]


==References==
==References==
Line 66: Line 68:
|author = Michael Simkin
|author = Michael Simkin
|date  = October 24, 2014
|date  = October 24, 2014
}}</ref>
<ref name="post153472">{{LinkForumThread
|format = ref
|title  = Re: Thread for your unsure discoveries
|p      = 153472
|author = dani
|date  = November 12, 2022
}}</ref>
}}</ref>
</references>
</references>


==External links==
==External links==
{{LinkLexicon|lex_s.htm#stabilizedswitchengine|name=Stabilized switch engine}}
* {{LinkLexicon|lex_s.htm#stabilizedswitchengine|name=Stabilized switch engine}}
*[http://www.pentadecathlon.com/objects/class4/typeB/SwitchEngine1/switchEngine1.php Single switch engine puffer trains] at the Life Objects Catalog
* [https://web.archive.org/web/20200728034553/http://www.pentadecathlon.com/objects/class4/typeB/SwitchEngine1/switchEngine1.php Single switch engine puffer trains] at the Life Objects Catalog
{{LinkCatagolue|yl384_1_59_7aeb1999980c43b4945fb7fcdb023326|format=linear growth}}
* {{LinkCatagolue|yl384_1_59_7aeb1999980c43b4945fb7fcdb023326|format=linear growth}}
 
[[Category:Patterns involving switch engines]]
[[Category:Patterns involving switch engines]]
__NOTOC__
__NOTOC__

Revision as of 23:47, 12 November 2022

Glider-producing switch engine
bo65b$bo65b$bo65b$5bo61b$b3o2bo60b$o4bo61b$o3bo62b$b3o63b$15b2o50b$13b 2o2bo49b$obo10b2o3bo48b$obo10b2o52b$obo64b$obo17bo46b$b2o14bo49b3$22bo 2bo41b$26bo40b$22bo10b2o32b$26bo6b2o32b$22b4o41b$21bo45b$22b2o43b$23bo 43b3$41b2o24b$41b2o24b3$13b2o52b$13b2o52b5$36b2o29b$36b3o9b2o17b$37bo 10bobo16b$49bo17b$33bo33b$27bo5bo33b$26bobo11b3o24b$26bo2bo9bob2o24b$ 16b2o9b2o10b2o26b$15bo2bo48b$15b2ob2o47b$18bobo46b$20b2o45b$17bo3bo45b $17bo2bo44b2o$18b3o44b2o3$54bo12b$53bobo11b$40bo12b2o12b$39bobo25b$39b 2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ TRACK -1/12 -1/12 THUMBSIZE 2 HEIGHT 480 Z 4 ]]
View animated image
View static image
Pattern type Puffer
Number of cells 123
Bounding box 67 × 60
Frequency class 21.0
Direction Diagonal
Period 384
Speed c/12
Discovered by Charles Corderman
Year of discovery 1971

The glider-producing switch engine (or glider-making switch engine) is a puffer that was found by Charles Corderman in the early 1970s.[1] It consists of a switch engine reacting with blocks to produce various still lifes, several blinkers, and a glider every 384 generations.

Because of its easy construction (see its predecessors below), it has appeared in some superlinear growth patterns including mosquito 3.

Occurrence

The glider-producing switch engine is the second most common naturally-occurring pattern that exhibits infinite growth, the most common being the block-laying switch engine. It is also the ninety-first most common object on Adam P. Goucher's Catagolue.[2]

Time bomb

The time bomb is a 17-cell pattern found by Douglas G. Petrie that evolves into a glider-producing switch engine.[3][4]

bo11b2o$obo4bo6bo$7bo4bo2b$2bo2bo3bo2bo2b$2b2o6bo4b$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ]]
Time bomb
(click above to open LifeViewer)
RLE: here Plaintext: here

Construction

x = 28, y = 6, rule = B3/S23 bobo$o$bo2bo$3b3o$26b2o$26b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ]]
Another simple predecessor of the glider-producing switch engine
(click above to open LifeViewer)
RLE: here Plaintext: here

Although a clean synthesis of the glider-producing switch engine requires 4 gliders, Michael Simkin found a 3-glider collision in October 2014 which includes the puffer in its ash.[5] This collision has the minimum number of gliders necessary to exhibit infinite growth, and is the only known 3-glider collision to do so.

There is a list of known 4-glider syntheses with the condition that all escaping gliders are forward-facing.[6]

The debris left behind by the glider-producing switch engine

References

  1. ↑ Robert Wainwright (December 1971). Lifeline, vol 4, page 2.
  2. ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
  3. ↑ Robert Wainwright (June 1973). Lifeline, vol 10, page 3.
  4. ↑ "Time bomb". The Life Lexicon. Stephen Silver. Retrieved on May 16, 2009.
  5. ↑ Michael Simkin (October 24, 2014). Re: Making switch-engines (discussion thread) at the ConwayLife.com forums
  6. ↑ dani (November 12, 2022). Re: Thread for your unsure discoveries (discussion thread) at the ConwayLife.com forums
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