Loading dock: Difference between revisions

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|h                = 2.7
|h                = 2.7
|v                = 0.17
|v                = 0.17
|symmetry        = .e
|rotor            = Six Ls
|rotor            = Six Ls
|discoverer      = David Buckingham
|discoverer      = David Buckingham
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|rulemin          = B3/S23
|rulemin          = B3/S23
|rulemax          = B378/S0235678
|rulemax          = B378/S0235678
|rulespecial      = [[Conway's Game of Life|Conway Life]]
|isorulemin      = B3ry/S2ack3ckry
|isorulemin      = B3ry/S2ack3ckry
|isorulemax      = B2-ae34cnqrtyz5-ekry6-ik78/S01c234-k5678
|isorulemax      = B2-ae34cnqrtyz5-ekry6-ik78/S01c234-k5678
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'''Loading dock''' is a {{period|3}} [[oscillator]] that was found by [[David Buckingham]] in September {{year|1972}}.<ref>{{CiteHickersonOscillators|accessdate=March 14, 2020}}</ref>
'''Loading dock''' is a {{period|3}} [[oscillator]] that was found by [[David Buckingham]] in September {{year|1972}}.<ref>{{CiteHickersonOscillators|accessdate=March 14, 2020}}</ref>


It has a [[stator]] variant with larger population but smaller bounding box, named '''six Ls''' due to consisting of six L-[[tetromino]]es ([[tail]]s), as shown below.
It has a [[stator]] variant with larger population but smaller bounding box, named '''six Ls''' due to one phase consisting of six L-[[tetromino]]es ([[tail]]s), as shown below.


{{EmbedViewer
{{EmbedViewer
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}}
}}


==Synthesis==
== Synthesis ==
A {{gliders|14}} [[synthesis]] for loading dock and a 20-glider synthesis for six Ls were found by [[Jeremy Tan]] on March 29, {{year|2019}} based on [[soup]]s submitted to [[Catagolue]].<ref name="post74101" /> The latter was improved to {{gliders|18|brief}} gliders by [[Mark Niemiec]] two days later.<ref name="post74258" />
A {{gliders|14}} [[synthesis]] for loading dock and a 20-glider synthesis for six Ls were found by [[Jeremy Tan]] on March 29, {{year|2019}} based on [[soup]]s submitted to [[Catagolue]].<ref name="post74101" /> The latter was improved to {{gliders|18|brief}} gliders by [[Mark Niemiec]] two days later.<ref name="post74258" />


In December {{year|2020}}, [[GUYTU6J]] found a {{gliders|13}} synthesis of a {{LinkCatagolue|xp3_ok4r2arz622611|patternname=stator variant|style=raw}} of this oscillator<ref name="post117043" /> based on a suggestion from [[gmc_nxtman]] dating to November {{year|2015}}.<ref name="post25165" /> In January {{year|2023}}, Chris857 found a {{gliders|10}} synthesis of that stator variant as well as a {{gliders|17}} synthesis of six Ls.<ref name="post155490"/> In January {{year|2023}}, [[Carson Cheng]] found a {{gliders|10}} synthesis of six Ls tying the cost of the other stator variant.<ref name="post156112"/> On September 3, {{year|2023}}, [[May13]] found a {{gliders|12}} synthesis of loading dock.<ref name="post166325"/>
In December {{year|2020}}, [[GUYTU6J]] found a {{gliders|13}} synthesis of a {{LinkCatagolue|xp3_ok4r2arz622611|patternname=stator variant|style=raw}} of this oscillator<ref name="post117043" /> based on a suggestion from [[gmc_nxtman]] dating to November {{year|2015}}.<ref name="post25165" /> In January {{year|2023}}, Chris857 found a {{gliders|10}} synthesis of that stator variant as well as a {{gliders|17}} synthesis of six Ls.<ref name="post155490"/> In January {{year|2023}}, [[Carson Cheng]] found a {{gliders|10}} synthesis of six Ls tying the cost of the other stator variant.<ref name="post156112"/> On September 3, {{year|2023}}, [[May13]] found a {{gliders|12}} synthesis of loading dock.<ref name="post166325"/>


==References==
== References ==
<references>
<references>
<ref name="post74101">{{LinkForumThread
<ref name="post74101">{{LinkForumThread
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</references>
</references>


==External links==
== External links ==
{{LinkLexicon|lex_l.htm#loadingdock}}
{{LinkLexicon|lex_l.htm#loadingdock}}
{{LinkCatagolue|xp3_ggc2d2sgz034b43}}
{{LinkCatagolue|xp3_ggc2d2sgz034b43}}
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{{LinkPentadecathlonObject|24P3.122}}
{{LinkPentadecathlonObject|24P3.122}}


{{Symmetry|180degree}}
{{seminatural}}
{{seminatural}}

Latest revision as of 19:16, 15 January 2026

Loading dock
x = 9, y = 8, rule = B3/S23 4bo$2b3o$bo3b2o$ob2o3bo$bo3b2obo$2b2o3bo$4b3o$4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 2 ZOOM 24 LOOP 3 ]]
View animated image
View static image
Pattern type Oscillator
Oscillator type Billiard table
Number of cells 22
Bounding box 9 × 8
Period 3 (mod: 3)
Heat 2.7
Volatility 0.17 | 0.17
Kinetic symmetry .e
Rotor type Six Ls
Discovered by David Buckingham
Year of discovery 1972

Loading dock is a period-3 oscillator that was found by David Buckingham in September 1972.[1]

It has a stator variant with larger population but smaller bounding box, named six Ls due to one phase consisting of six L-tetrominoes (tails), as shown below.

x = 7, y = 8, rule = B3/S23 3bo$b3o2bo$o3b3o$3o$4b3o$3o3bo$o2b3o$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 2 ZOOM 24 LOOP 3 AUTOSTART ]]
six Ls
(click above to open LifeViewer)
RLE: here Plaintext: here
Catagolue: here

Synthesis

A 14-glider synthesis for loading dock and a 20-glider synthesis for six Ls were found by Jeremy Tan on March 29, 2019 based on soups submitted to Catagolue.[2] The latter was improved to 18 gliders by Mark Niemiec two days later.[3]

In December 2020, GUYTU6J found a 13-glider synthesis of a stator variant of this oscillator[4] based on a suggestion from gmc_nxtman dating to November 2015.[5] In January 2023, Chris857 found a 10-glider synthesis of that stator variant as well as a 17-glider synthesis of six Ls.[6] In January 2023, Carson Cheng found a 10-glider synthesis of six Ls tying the cost of the other stator variant.[7] On September 3, 2023, May13 found a 12-glider synthesis of loading dock.[8]

References

  1. ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. ↑ Jeremy Tan (March 29, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  3. ↑ Mark Niemiec (March 31, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  4. ↑ GUYTU6J (December 27, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  5. ↑ gmc_nxtman (November 17, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  6. ↑ Chris857 (January 2, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  7. ↑ Carson Cheng (January 18, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  8. ↑ May13 (September 3, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
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