Difference between revisions of "Glider-producing switch engine"

From LifeWiki
Jump to: navigation, search
m (Removed Life 1.05 and 1.06)
(Reword and standardize reference)
 
Line 30: Line 30:
  
 
==Synthesis==
 
==Synthesis==
Although clean synthesis of glider-producing switch engine requires 5 gliders, [[Michael Simkin]] has found very messy 3 gliders synthesis in 2014<ref>{{Cite web|url=http://www.conwaylife.com/forums/viewtopic.php?p=13988#p13988|title=3 gliders infinite growth|author=Michael Simkin}}</ref>. This is the only known three glider synthesis of any infinite growth pattern, and it has the minimal number of gliders possible for infinite growth.
+
Although clean synthesis of the glider-producing switch engine requires 5 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.
  
 
==Image gallery==
 
==Image gallery==
Line 41: Line 41:
  
 
==References==
 
==References==
<references />
+
<references>
 +
<ref name="post13988">{{LinkForumThread
 +
|format = ref
 +
|title  = Re: Making switch-engines
 +
|p      = 13988
 +
|author = Michael Simkin
 +
|date  = October 24, 2014
 +
}}</ref>
 +
</references>
  
 
==External links==
 
==External links==

Latest revision as of 18:05, 15 February 2019

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 ]]
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. 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.[1]

Commonness

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 (shown below) is a 17-cell pattern that was found by Doug Petrie that evolves into a glider-producing switch engine.[3]

Synthesis

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

Image gallery

The debris left behind by the glider-producing switch engine
The time bomb is a predecessor of the glider-producing switch engine
RLE: here
Another simple predecessor of the glider-producing switch engine
Download RLE: click here

References

  1. "Mosquito 3". The Life Lexicon. Stephen Silver. Retrieved on June 1, 2009.
  2. Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
  3. "Time bomb". The Life Lexicon. Stephen Silver. Retrieved on May 16, 2009.
  4. Michael Simkin. Re: Making switch-engines (discussion thread) at the ConwayLife.com forums

External links