Semi-cenark

A semi-cenark is either of two semi-Snark variants discovered by Tanner Jacobi in November 2017.[1] The name is due to the initial converter, which produces a century output for every two input gliders. The minimum safe repeat time is 43 ticks for the smaller initial catalyst shown in CC semi-cenark and CP semi-cenark, or 42 ticks with the slightly larger catalyst variant shown below.

<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 37, y = 37, rule = B3/S23 obo$b2o$bo7$9bobo$10b2o$10bo$13bo$14b2o$13b2o$29bo$27b3o$26bo$26b2o3$ 22bo$14b2o7b2o2bo6b3o$14bo2bo4b2o2bobo7bo$12b2o2b2o8b2o7bo$11bo2b2o$ 11b2o3b2o$16bobo$17bo$34b2o$32bo2bo$21b2o9b3o$22bo6bo$19b3o7b4o$19bo 12bo$31bo$31b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBNAIL THUMBSIZE 2 HEIGHT 480 X 7 Y 5 THEME 6 GPS 20 LOOP 50 ZOOM 16 AUTOSTART ]]<html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html>
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There is also the possibility of overclocking at period 36, 38, or 39. The reset glider can be followed immediately by a new trigger glider, as shown above, so the minimum repeat time for an intermittent stream of gliders is only 36 + 14 = 50 ticks.

The semi-cenarks were part of a series of new stable pulse dividers (the others being the tremi-Snark and the quadri-Snark) which collectively ranked third place in the Pattern of the Year 2017 competition on the ConwayLife.com forums, behind Tanner's p46 and the 2-engine Cordership.[2]

Also see
gollark: <@!330678593904443393> please become a spy for a country/language.
gollark: Not by directly running mwoffliner on it because oh bees my internet connection.
gollark: When I download Wikipedia, it will be in a pregenerated ZIM file thing.
gollark: Hydration is important, apiohydroform!
gollark: muahahahaha.

References
  1. Tanner Jacobi (November 3, 2017). Re: Execution of Old Guns by Variable-Speed Firing Squad (discussion thread) at the ConwayLife.com forums
  2. Dave Greene (February 19, 2018). Re: Pattern of the Year 2017 -- votes (discussion thread) at the ConwayLife.com forums
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