P43 Snark loop: Difference between revisions

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|name        = p43 Snark loop
|name        = p43 Snark loop
|pname        = p43gliderloop
|pname        = p43gliderloop
|f1          = Relay
|c            = 228
|c            = 228
|bx          = 65
|bx          = 65
Line 9: Line 10:
|h            = 66.05
|h            = 66.05
|v            = 0.81
|v            = 0.81
|symmetry    = rc
|discoverer  = Mike Playle
|discoverer  = Mike Playle
|discoveryear = 2013
|discoveryear = 2013
Line 16: Line 18:
|isorulemin  = B3/S23
|isorulemin  = B3/S23
|isorulemax  = B34c8/S234c5e6n8
|isorulemax  = B34c8/S234c5e6n8
|synthesis    = 224
|synthesis    = 107
|rle          = true
|rle          = true
|viewerconfig = #C [[ THUMBSIZE 2 GPS 10 LOOP 43 ZOOM 8 HEIGHT 600 WIDTH 600 POPUPHEIGHT 600 POPUPWIDTH 600 ]]
|viewerconfig = #C [[ THUMBSIZE 2 GPS 10 LOOP 43 ZOOM 8 HEIGHT 600 WIDTH 600 POPUPHEIGHT 600 POPUPWIDTH 600 ]]
|apgcode      = xp43_ylo8bp6o8g0s4gozyfggy31230343zyg346y133zym217wggx2c6ycgzyr1226yd6511zwg4cy7a64yo8acxooxg89fgkczw1plll2y7c871yfgs26y78llljgz651ui21x33x6a2yo4cay7641zy5ggkcydc88gzy51ycc68x11wsg8zyvooy1c4ozyqo4o0o8gy311zyn31470123cjq23
|apgcode      = xp43_ylo8bp6o8g0s4gozyfggy31230343zyg346y133zym217wggx2c6ycgzyr1226yd6511zwg4cy7a64yo8acxooxg89fgkczw1plll2y7c871yfgs26y78llljgz651ui21x33x6a2yo4cay7641zy5ggkcydc88gzy51ycc68x11wsg8zyvooy1c4ozyqo4o0o8gy311zyn31470123cjq23
}}
}}
The '''p43 Snark loop''' is a [[period]] [[:Category:Oscillators with period 43|43]] [[oscillator]] made from [[Snark]] reflectors. It is the smallest of an infinite family of Snark-based [[adjustable glider loops]] that can have any period from 43 up.
The '''p43 Snark loop''' is a {{period|43}} [[oscillator]] made from [[Snark]] reflectors. It is the smallest of an infinite family of Snark-based [[adjustable glider loops]] that can have any period from 43 up.


There are much smaller glider loops containing four gliders, with a total signal path length of 216+8n and therefore adjustable to any period of the form 54+2n.  However, this is the smallest loop that can contain eight gliders, which is a requirement for universal adjustability.
There are much smaller glider loops containing four gliders, with a total signal path length of 216+8n and therefore adjustable to any period of the form 54+2n.  However, this is the smallest loop that can contain eight gliders, which is a requirement for universal adjustability.


A 226-[[glider]] [[synthesis]] of this oscillator was discovered by Jeremy Tan on June 9, {{year|2019}}.<ref name="post77388" />
A 226-[[glider]] [[synthesis]] of this oscillator was discovered by Jeremy Tan on June 9, {{year|2019}}.<ref name="post77388" /> This was reduced to 196 gliders on October 16, {{year|2020}} by [[MathAndCode]] and [[GUYTU6J]],<ref name="post106801" /> and then to 131 gliders in April {{year|2021}} by [[MathAndCode]] and [[Dave Greene]].<ref name="message833837469395976213" /><ref name="message834063711177670657" /><ref name="message834081514799104000" />


==References==
== See also ==
* [[p67 Snark loop]]
 
== References ==
<references>
<references>
<ref name="post77388">{{LinkForumThread
<ref name="post77388">{{LinkForumThread
Line 35: Line 40:
|author = Jeremy Tan
|author = Jeremy Tan
|date  = June 9, 2019
|date  = June 9, 2019
}}</ref>
<ref name="post106801">{{LinkForumThread
|format = ref
|title  = Re: Synthesising Oscillators
|p      = 106801
|author = GUYTU6J
|date  = October 16, 2020
}}</ref>
<ref name="message833837469395976213">{{CiteDiscord
|author  = MathAndCode
|date    = April 20, 2021
|channel = cgol
|id      = 833837469395976213
}}</ref>
<ref name="message834063711177670657">{{CiteDiscord
|author  = MathAndCode
|date    = April 20, 2021
|channel = cgol
|id      = 834063711177670657
}}</ref>
<ref name="message834081514799104000">{{CiteDiscord
|author  = MathAndCode
|date    = April 20, 2021
|channel = cgol
|id      = 834081514799104000
}}</ref>
}}</ref>
</references>
</references>


==External links==
== External links ==
{{LinkCatagolue|xp43_ylo8bp6o8g0s4gozyfggy31230343zyg346y133zym217wggx2c6ycgzyr1226yd6511zwg4cy7a64yo8acxooxg89fgkczw1plll2y7c871yfgs26y78llljgz651ui21x33x6a2yo4cay7641zy5ggkcydc88gzy51ycc68x11wsg8zyvooy1c4ozyqo4o0o8gy311zyn31470123cjq23|format=extended|patternname=p43 Snark loop}}
{{LinkCatagolue|xp43_ylo8bp6o8g0s4gozyfggy31230343zyg346y133zym217wggx2c6ycgzyr1226yd6511zwg4cy7a64yo8acxooxg89fgkczw1plll2y7c871yfgs26y78llljgz651ui21x33x6a2yo4cay7641zy5ggkcydc88gzy51ycc68x11wsg8zyvooy1c4ozyqo4o0o8gy311zyn31470123cjq23|format=extended|patternname=p43 Snark loop}}


{{Symmetry|90degree}}
{{DISPLAYTITLE:p43 Snark loop}}
{{DISPLAYTITLE:p43 Snark loop}}

Latest revision as of 17:53, 10 March 2025

p43 Snark loop
27b2o$27bobo$29bo4b2o$25b4ob2o2bo2bo$25bo2bo3bobob2o$28bobobobo$29b2ob obo$33bo2$19b2o$20bo8bo$20bobo5b2o$21b2o$35bo$36bo$34b3o2$25bo$25b2o$ 24bobo4b2o22bo$31bo21b3o$32b3o17bo$34bo17b2o2$45bo$46b2o12b2o$45b2o14b o$3b2o56bob2o$4bo9b2o37bo5b3o2bo$2bo10bobo37b2o3bo3b2o$2b5o8bo5b2o35b 2obo$7bo13bo22b2o15bo$4b3o12bobo21bobo12b3o$3bo15b2o22bo13bo$3bob2o35b 2o5bo8b5o$b2o3bo3b2o37bobo10bo$o2b3o5bo37b2o9bo$2obo56b2o$3bo14b2o$3b 2o12b2o$19bo2$11b2o17bo$12bo17b3o$9b3o21bo$9bo22b2o4bobo$38b2o$39bo2$ 28b3o$28bo$29bo$42b2o$35b2o5bobo$35bo8bo$44b2o2$31bo$30bobob2o$30bobob obo$27b2obobo3bo2bo$27bo2bo2b2ob4o$29b2o4bo$35bobo$36b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 GPS 10 LOOP 43 ZOOM 8 HEIGHT 600 WIDTH 600 POPUPHEIGHT 600 POPUPWIDTH 600 ]]
View static image
Pattern type Oscillator
Oscillator type Relay
Number of cells 228
Bounding box 65 × 65
Period 43 (mod: 43)
Heat 66.05
Volatility 0.81 | 0.81
Kinetic symmetry rc
Discovered by Mike Playle
Year of discovery 2013

The p43 Snark loop is a period-43 oscillator made from Snark reflectors. It is the smallest of an infinite family of Snark-based adjustable glider loops that can have any period from 43 up.

There are much smaller glider loops containing four gliders, with a total signal path length of 216+8n and therefore adjustable to any period of the form 54+2n. However, this is the smallest loop that can contain eight gliders, which is a requirement for universal adjustability.

A 226-glider synthesis of this oscillator was discovered by Jeremy Tan on June 9, 2019.[1] This was reduced to 196 gliders on October 16, 2020 by MathAndCode and GUYTU6J,[2] and then to 131 gliders in April 2021 by MathAndCode and Dave Greene.[3][4][5]

See also

References

  1. ↑ Jeremy Tan (June 9, 2019). p43 snark loop synthesis (discussion thread) at the ConwayLife.com forums
  2. ↑ GUYTU6J (October 16, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  3. ↑ MathAndCode (April 20, 2021). Message in #cgol on the Conwaylife Lounge Discord server
  4. ↑ MathAndCode (April 20, 2021). Message in #cgol on the Conwaylife Lounge Discord server
  5. ↑ MathAndCode (April 20, 2021). Message in #cgol on the Conwaylife Lounge Discord server


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