Difference between revisions of "Merzenich's p64"

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m (Added symmetry)
(→‎See also: These links seem to have been added on the grounds that the active region is the same, but it's not -- it's just made up of the same pieces, R-pentomino and beehive.)
 
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|v            = 0.97
|v            = 0.97
|sv          = 0.97
|sv          = 0.97
|discoverer  = Matthias Merzenich
|discoveryear = 2010
|rulemin      = B3/S23
|rulemin      = B3/S23
|rulemax      = B38/S238
|rulemax      = B38/S238
|synthesis    = 20
|rulespecial  = [[Conway's Game of Life|Conway Life]]
|discoverer  = Matthias Merzenich
|isorulemin  = B3-k/S23
|isorulemax  = B36c8/S234c5cekr6ein7c8
|synthesis    = 10
|plaintext    = true
|rle          = true
|rle          = true
|viewerconfig = #C [[ LOOP 64 GPS 8 THUMBSIZE 2 ZOOM 16 WIDTH 480 HEIGHT 480 ]]
|viewerconfig = #C [[ LOOP 64 GPS 8 THUMBSIZE 2 ZOOM 16 WIDTH 480 HEIGHT 480 ]]
|apgcode      = xp64_y1j3zy031d8ey633zggy6s4c0gz11y8hj1zya11
|apgcode      = xp64_y1j3zy031d8ey633zggy6s4c0gz11y8hj1zya11
}}
}}
'''Merzenich's p64''', aka '''4 [[block]]s hassling 2 [[beehive]]s and 2 [[R-pentomino]]s''',<ref>http://conwaylife.com/ref/mniemiec/period.htm#p64</ref> is the smallest known period-64 oscillator.
'''Merzenich's p64''' (or '''4 [[block]]s hassling 2 [[beehive]]s and 2 [[R-pentomino]]es''') is the smallest known {{period|64}} [[oscillator]], and was discovered by [[Matthias Merzenich]] on October 30, {{year|2010}}.<ref>{{cite web|url=https://github.com/Matthias-Merzenich/osc-supplement|author=Matthias Merzenich|title=osc-supplement pattern collection|date=April 18, 2018|accessdate=October 28, 2020}}</ref>
 
Two copies of this oscillator are seen in the [[pre-pulsar shuttle oscillators|period-64 pre-pulsar shuttle]], constructed by Merzenich with the help of [[praosylen]] on June 20, {{year|2015}}.<ref name="post20550" />
 
A {{gliders|14}} [[synthesis]] of this oscillator was found by [[Ian07]] on August 9, {{year|2019}},<ref name="post80834" /> which was improved to {{gliders|10|text=10 gliders}} by [[Goldtiger997]] the next day.<ref name="post80853" />
 
The oscillator first appeared semi-naturally on February 12, {{year|2022}}, in a soup by [[Charity Engine]].<ref name="message942057928855285820" /> Since then, about 1 in 7×10<sup>10</sup> soups in the correct symmetry (C2_1) form a Merzenich's p64 in the centre.
 
The active region in Merzenich's p64 ranks 31st in the [[list of common evolutionary sequences]], and the region is identified as belonging to Merzenich's p64 rather than having a distinct name.
 
==Gallery==
{|style="margin:auto;width:360px;"
|{{EmbedViewer
|pname = 31p3onmerzenichsp64
|position    = center
|viewerconfig = #C [[ THUMBSIZE 2 ZOOM 8 ]]
|caption      = Former [[SKOP]] 192: 31P3 on Merzenich's p64
}}
|-
|{{EmbedViewer
|pname = fumaroleonmerzenichsp64
|position    = center
|viewerconfig = #C [[ THUMBSIZE 2 ZOOM 8 ]]
|caption      = [[SKOP]] 320: [[fumarole]] on Merzenich's p64
}}
|}


Two copies of this oscillator are seen in [[pre-pulsar shuttle 64]].
==See also==
* [[51P384]]


== References ==
==References==
<references />
<references>
<ref name="post20550">{{LinkForumThread
|format = ref
|title  = Re: Thread For Your Accidental Discoveries
|p      = 20550
|author = Matthias Merzenich
|date  = June 20, 2015
}}</ref>
<ref name="post80834">{{LinkForumThread
|format = ref
|title  = Re: Synthesising Oscillators
|p      = 80834
|author = Ian07
|date  = August 9, 2019
}}</ref>
<ref name="post80853">{{LinkForumThread
|format = ref
|title  = Re: Synthesising Oscillators
|p      = 80853
|author = Goldtiger997
|date  = August 10, 2019
}}</ref>
<ref name="message942057928855285820">{{CiteDiscord
|author  = catglue
|date    = February 12, 2022
|channel = cgol
|id      = 942057928855285820
}}</ref>
</references>


==External links==
==External links==
{{LinkCatagolue|xp64_y1j3zy031d8ey633zggy6s4c0gz11y8hj1zya11}}
* {{LinkNiemiec|filename=period.htm#p64|title=1 period-64 oscillator}}
* {{LinkCatagolue|xp64_y1j3zy031d8ey633zggy6s4c0gz11y8hj1zya11}}


{{Symmetry|180degree}}
{{Symmetry|180degree|osc=turn90}}
[[Category:Semi-natural periodic objects]]

Latest revision as of 21:17, 26 March 2024

Merzenich's p64
5b2o$5b2o3$8b2o$9b2o8b2o$19b2o2$10bobo$9bo3bo$8bo3bo$7bo3bo$8bobo2$2o$ 2o8b2o$11b2o3$14b2o$14b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 64 GPS 8 THUMBSIZE 2 ZOOM 16 WIDTH 480 HEIGHT 480 ]]
View static image
Pattern type Oscillator
Number of cells 34
Bounding box 21 × 21
Period 64
Mod 32
Heat 20.75
Volatility 0.97
Strict volatility 0.97
Discovered by Matthias Merzenich
Year of discovery 2010

Merzenich's p64 (or 4 blocks hassling 2 beehives and 2 R-pentominoes) is the smallest known period-64 oscillator, and was discovered by Matthias Merzenich on October 30, 2010.[1]

Two copies of this oscillator are seen in the period-64 pre-pulsar shuttle, constructed by Merzenich with the help of praosylen on June 20, 2015.[2]

A 14-glider synthesis of this oscillator was found by Ian07 on August 9, 2019,[3] which was improved to 10 gliders by Goldtiger997 the next day.[4]

The oscillator first appeared semi-naturally on February 12, 2022, in a soup by Charity Engine.[5] Since then, about 1 in 7×1010 soups in the correct symmetry (C2_1) form a Merzenich's p64 in the centre.

The active region in Merzenich's p64 ranks 31st in the list of common evolutionary sequences, and the region is identified as belonging to Merzenich's p64 rather than having a distinct name.

Gallery

x = 31, y = 21, rule = B3/S23 5b2o$5b2o3$8b2o$9b2o8b2o$19b2o5b2ob2o$27bob2o$10bobo10b2o2bo$9bo3bo9b 3obo$8bo3bo9bo2b2o$7bo3bo10bo$8bobo11bo$21bo$2o23bo$2o8b2o9b2obo2bo$ 11b2o10bo3bo$27bo$24bo$14b2o9b2o$14b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 8 ]]
Former SKOP 192: 31P3 on Merzenich's p64
(click above to open LifeViewer)
RLE: here Plaintext: here
x = 21, y = 28, rule = B3/S23 5b2o4b2o$5bobo2bobo$7bo2bo$6bo4bo$6b2o2b2o$8b2o2$14b2o$14b2o4$2o$2o2$10b3o$3b 3o4b3o$5bo3bobo3bo$8b3o4b3o$8b3o2$19b2o$19b2o4$5b2o$5b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 8 ]]
SKOP 320: fumarole on Merzenich's p64
(click above to open LifeViewer)
RLE: here Plaintext: here

See also

References

  1. ↑ Matthias Merzenich (April 18, 2018). "osc-supplement pattern collection". Retrieved on October 28, 2020.
  2. ↑ Matthias Merzenich (June 20, 2015). Re: Thread For Your Accidental Discoveries (discussion thread) at the ConwayLife.com forums
  3. ↑ Ian07 (August 9, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  4. ↑ Goldtiger997 (August 10, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  5. ↑ catglue (February 12, 2022). Message in #cgol on the Conwaylife Lounge Discord server

External links

Retrieved from "https://conwaylife.com/w/index.php?title=Merzenich%27s_p64&oldid=147757"