Monogram: Difference between revisions
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It first appeared [[semi-natural]]ly in September {{year|2014}} in a [[soup]] found by [[Josh Ball]] using [[apgsearch]].<ref name="post13516" /> It later appeared in an asymmetric soup on May 5, {{year|2015}}.<ref name="post19372" /> | It first appeared [[semi-natural]]ly in September {{year|2014}} in a [[soup]] found by [[Josh Ball]] using [[apgsearch]].<ref name="post13516" /> It later appeared in an asymmetric soup on May 5, {{year|2015}}.<ref name="post19372" /> | ||
[[Ivan Fomichev]] found a 12 | [[Ivan Fomichev]] found a {{gliders|12}} [[synthesis]] for a monogram based on an asymmetric soup on October 18, {{year|2015}}.<ref name="post23928" /> This was reduced to {{gliders|8|text=8 gliders}} by [[GUYTU6J]] using another soup on May 22, {{year|2021}},<ref name="post130643" /><ref name="j1288605620" /> and then to {{gliders|7|text=7 gliders}} by [[MathAndCode]] on July 28, 2021.<ref name="post134187" /><ref name="j1460905601" /> | ||
==References== | ==References== | ||
<references> | <references> | ||
<ref name="j1288605620">{{CiteCatagolueJob|job=1288605620|date=May 24, 2021}}</ref> | |||
<ref name="j1460905601">{{CiteCatagolueJob|job=1460905601|date=July 29, 2021}} ({{LinkCatagolue|xp4_7zzy7hv4a4vh|style=raw}} updated to 6 gliders)</ref> | |||
<ref name="post13516">{{LinkForumThread | <ref name="post13516">{{LinkForumThread | ||
|format = ref | |format = ref | ||
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==External links== | ==External links== | ||
{{LinkLexicon|lex_m.htm#monogram}} | * {{LinkLexicon|lex_m.htm#monogram}} | ||
{{LinkCatagolue|xp4_hv4a4vh}} | * {{LinkCatagolue|xp4_hv4a4vh}} | ||
{{LinkPentadecathlonObject|18P4.1}} | * {{LinkPentadecathlonObject|18P4.1}} | ||
* {{LinkNiemiec|p4.htm#p4-18|The 3 eighteen-bit period 4 oscillators|rle=18/18mg.rle}} | |||
{{Symmetry|orthogonal4|osc=flip}} | {{Symmetry|orthogonal4|osc=flip}} | ||
{{Sparker|p=4|strength=weak}} | {{Sparker|p=4|strength=weak}} | ||
Revision as of 18:25, 30 November 2022
| Monogram | |||||||||
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| Pattern type | Oscillator | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number of cells | 18 | ||||||||
| Bounding box | 7 × 7 | ||||||||
| Frequency class | 40.9 | ||||||||
| Period | 4 (mod: 2) | ||||||||
| Heat | 14 | ||||||||
| Volatility | 0.88 | 0.88 | ||||||||
| Kinetic symmetry | Unspecified | ||||||||
| Discovered by | Dean Hickerson | ||||||||
| Year of discovery | 1989 | ||||||||
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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][8] and then to 7 gliders by MathAndCode on July 28, 2021.[9][10]
References
- ↑ "Initials". The Life Lexicon. Stephen Silver. Retrieved on June 13, 2009.
- ↑ "JHC". The Life Lexicon. Stephen Silver. Retrieved on April 30, 2009.
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ Josh Ball (September 28, 2014). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Lewis Patterson (May 5, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Ivan Fomichev (October 18, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ GUYTU6J (May 22, 2021). Re: Thread for your unsure discoveries (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#1288605620) (May 24, 2021). Job triggered by Adam P. Goucher at GitLab Catagolue project.
- ↑ MathAndCode (July 28, 2021). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- ↑ shinjuku (#1460905601) (July 29, 2021). Job triggered by Adam P. Goucher at GitLab Catagolue project. (xp4_7zzy7hv4a4vh updated to 6 gliders)
External links
- Monogram at the Life Lexicon
- Monogram at Adam P. Goucher's Catagolue
- 18P4.1 at Heinrich Koenig's Game of Life Object Catalogs
- The 3 eighteen-bit period 4 oscillators at Mark D. Niemiec's Life Page (download pattern file: 18/18mg.rle)
Categories:
- Patterns
- Patterns with Catagolue frequency class 40
- Natural periodic objects
- Oscillators with 18 cells
- Periodic objects with minimum population 18
- Patterns with 18 cells
- Patterns found by Dean Hickerson
- Patterns found in 1989
- Patterns that can be constructed with 7 gliders
- Oscillators
- Oscillators with period 4
- Oscillators with mod 2
- Oscillators with heat 14
- Oscillators with volatility 0.88
- Oscillators with strict volatility 0.88
- Patterns with rectangular orthogonal symmetry
- Flipping oscillators
- Sparkers
- Sparkers with period 4
- Weak sparkers