Monogram

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Monogram
x = 7, y = 5, rule = B3/S23 2o3b2o$bobobo$b2ob2o$bobobo$2o3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 2 ZOOM 24 LOOP 4 ]]
Pattern type Oscillator
Number of cells 18
Bounding box 7×7
Frequency class 40.9
Period 4
Mod 2
Heat 14
Volatility 0.88
Strict volatility 0.88
Discovered by Dean Hickerson
Year of discovery 1989

Monogram (or initials[1] or JHC[2]) is a period-4 oscillator that was found by Dean Hickerson on August 11, 1989.[3] It produces some weak sparks which can be utilized in e.g. the stabilization of the carnival shuttle.

It first appeared semi-naturally in September 2014 in a soup found by Josh Ball using apgsearch.[4] It later appeared in an asymmetric soup on May 5, 2015.[5]

Ivan Fomichev found a 12-glider synthesis for a monogram based on an asymmetric soup on October 18, 2015.[6] This was reduced to 8 gliders by GUYTU6J using another soup on May 22, 2021.[7]

References

  1. "Initials". The Life Lexicon. Stephen Silver. Retrieved on June 13, 2009.
  2. "JHC". The Life Lexicon. Stephen Silver. Retrieved on April 30, 2009.
  3. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  4. Josh Ball (September 28, 2014). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  5. Lewis Patterson (May 5, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  6. Ivan Fomichev (October 18 , 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  7. GUYTU6J (May 22, 2021). Re: Thread for your unsure discoveries (discussion thread) at the ConwayLife.com forums

External links

  • 18P4.1 at Heinrich Koenig's Game of Life Object Catalogs