4-engine Cordership - Revision history

Neocaridina at 20:15, 17 January 2026

2026-01-17T20:15:44Z

← Older revision		Revision as of 20:15, 17 January 2026
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	\|pname = infinitecordershipgun		\|pname = infinitecordershipgun
	\|position = center		\|position = center
	\|viewerconfig = #C [[ THUMBSIZE 4 WIDTH 1200 HEIGHT 900 ZOOM 0.75 ~~STARTFROM 6500~~ ]]		\|viewerconfig = #C [[ THUMBSIZE 3 WIDTH 1200 HEIGHT 900 ZOOM 0.75 ]]
	\|caption = Infinite Cordership gun		\|caption = Infinite Cordership gun
	\|style = width:300px;		\|style = width:300px;

Neocaridina at 22:17, 15 January 2026

2026-01-15T22:17:17Z

← Older revision		Revision as of 22:17, 15 January 2026
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	\|rulemin = B3/S23		\|rulemin = B3/S23
	\|rulemax = B3/S23		\|rulemax = B3/S23
	~~\|rulespecial = [[Conway's Game of Life\|Conway Life]]~~
	\|isorulemin = B3/S23		\|isorulemin = B3/S23
	\|isorulemax = B3/S23		\|isorulemax = B3/S23

Muzik at 17:15, 9 August 2024

2024-08-09T17:15:22Z

← Older revision		Revision as of 17:15, 9 August 2024
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	\|z = 8c/96		\|z = 8c/96
	\|h = 178.0		\|h = 178.0
			\|symmetry = /
	\|discoverer = David Bell		\|discoverer = David Bell
	\|discoveryear = 2005		\|discoveryear = 2005
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	== Bell's original version ==		== Bell's original version ==

	David Bell's original version has a minimum population of 134 [[cell]]s, which made it once the smallest known Cordership until it was superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{LinkGoLNews\|2005/08/new_sawtooth_patterns.html\|archivedate=20090720232132\|title=New Sawtooth Patterns\|date=August 10, 2005\|author=Dave Greene}}</ref> It can also be used to stabilize [[switchwave]] by pulling apart the two halves and inserting an arbitrary number of switch engines.		David Bell's original version has a minimum population of 134 [[cell]]s, which made it once the smallest known Cordership until it was superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{LinkGoLNews\|2005/08/new_sawtooth_patterns.html\|archivedate=20090720232132\|title=New Sawtooth Patterns\|date=August 10, 2005\|author=Dave Greene}}</ref> It can also be used to stabilize [[switchwave]] by pulling apart the two halves and inserting an arbitrary number of switch engines.

Line 48:		Line 48:
	The front and back halves of the Cordership can be produced by identical [[glider construction]]s, which was used in [[Goldtiger997]]'s stable [[glider]] to 4-engine cordership [[converter]] in September {{year\|2017}}.<ref name="post51093" /> [[Adam P. Goucher]] replaced two [[Snark]]s with [[semi-Snark]]s as [[toggle circuit]], so that for every input of the converter only one of two alternate halves is activated, and then connected the device to a [[sqrtgun]], whose output stream has increasing gaps between successive gliders; the result is a "[[gun]]" that fires infinite distinct Corderships.<ref name="post55400" />		The front and back halves of the Cordership can be produced by identical [[glider construction]]s, which was used in [[Goldtiger997]]'s stable [[glider]] to 4-engine cordership [[converter]] in September {{year\|2017}}.<ref name="post51093" /> [[Adam P. Goucher]] replaced two [[Snark]]s with [[semi-Snark]]s as [[toggle circuit]], so that for every input of the converter only one of two alternate halves is activated, and then connected the device to a [[sqrtgun]], whose output stream has increasing gaps between successive gliders; the result is a "[[gun]]" that fires infinite distinct Corderships.<ref name="post55400" />

	{\|style="margin:auto;width:420px;"		{\| style="margin:auto;width:420px"
	\|{{EmbedViewer		\|{{EmbedViewer
	\|viewerconfig = #C [[ AUTOSTART GPS 12 ZOOM 2 WIDTH 640 HEIGHT 400 TRACKLOOP 96 -1/12 -1/12 ]]		\|viewerconfig = #C [[ AUTOSTART GPS 12 ZOOM 2 WIDTH 640 HEIGHT 400 TRACKLOOP 96 -1/12 -1/12 ]]
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	An analysis of the 108-cell Cordership reveals that the inner two and outer two switch engines have some degree of temporal independence from each other. The reason is that the inner exhaust from the outer engines create a block that is then hit by the inner engines' outer exhaust, making a [[blinker]] that then gets hit with the outer engines' outer exhaust (as well as a block from the outer engines' outer exhaust) to create another block; this is then destroyed by the outer exhaust from the outer switch engines. Each new object only needs to form in time to get converted into the next object/nothing, and this allows for variability in timing. In addition, there is also a small degree of spatial independence. The inner engines' inner exhaust cancel out via the same interaction as in switchwave, said exhaust still cancels out if the halves are put one cell farther away from each other than usual. As a result, there are many variations of this Cordership.		An analysis of the 108-cell Cordership reveals that the inner two and outer two switch engines have some degree of temporal independence from each other. The reason is that the inner exhaust from the outer engines create a block that is then hit by the inner engines' outer exhaust, making a [[blinker]] that then gets hit with the outer engines' outer exhaust (as well as a block from the outer engines' outer exhaust) to create another block; this is then destroyed by the outer exhaust from the outer switch engines. Each new object only needs to form in time to get converted into the next object/nothing, and this allows for variability in timing. In addition, there is also a small degree of spatial independence. The inner engines' inner exhaust cancel out via the same interaction as in switchwave, said exhaust still cancels out if the halves are put one cell farther away from each other than usual. As a result, there are many variations of this Cordership.

	==See also==		== See also ==
	* {{CategoryLink\|Cordership variants}}		* {{CategoryLink\|Cordership variants}}

	==References==		== References ==
	<references>		<references>
	<ref name="post14135">{{LinkForumThread		<ref name="post14135">{{LinkForumThread
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	</references>		</references>

	==External links==		== External links ==
	* {{LinkCatagolue\|xq96_yzy1573w8aegvzyzyl33zyzytoozyzy3442cia049uo239e4zyx848xgg8ggzyx111w166473zzyi8k0szg0gyho4ooz331gy88mgy016663z8babcy6g38i1zybod1j3zy1ggy5131zy111zy9cc\|format=extended}}		* {{LinkCatagolue\|xq96_yzy1573w8aegvzyzyl33zyzytoozyzy3442cia049uo239e4zyx848xgg8ggzyx111w166473zzyi8k0szg0gyho4ooz331gy88mgy016663z8babcy6g38i1zybod1j3zy1ggy5131zy111zy9cc\|format=extended}}

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	[[Category:Patterns involving switch engines]]		[[Category:Patterns involving switch engines]]
	[[Category:Non-monotonic spaceships]]		[[Category:Non-monotonic spaceships]]
	~~{{Symmetry\|diagonal2}}~~
	__NOTOC__		__NOTOC__

Prime Raptor21: /* Smaller versions */

2024-04-15T15:50:15Z

Smaller versions

← Older revision		Revision as of 15:50, 15 April 2024
Line 78:		Line 78:
	}}		}}

	An analysis of the 108-cell Cordership reveals that the inner two and outer two switch engines have some degree of temporal independence from each other. The reason is that the inner exhaust from the outer engines create a block that is then hit by the inner engines' outer exhaust, making a [[blinker]] that then gets hit with the outer engines' outer exhaust (as well as a block from the outer engines' outer exhaust) to create another block-this is then destroyed by the outer exhaust from the outer switch engines. Each new object only needs to form in time to get converted into the next object/nothing, and this allows for variability in timing. In addition, there is also a small degree of spatial independence. The inner engines' inner exhaust cancel out via the same interaction as in switchwave, said exhaust still cancels out if the halves are put one cell farther away from each other than usual. As a result, there are many variations of this Cordership.		An analysis of the 108-cell Cordership reveals that the inner two and outer two switch engines have some degree of temporal independence from each other. The reason is that the inner exhaust from the outer engines create a block that is then hit by the inner engines' outer exhaust, making a [[blinker]] that then gets hit with the outer engines' outer exhaust (as well as a block from the outer engines' outer exhaust) to create another block; this is then destroyed by the outer exhaust from the outer switch engines. Each new object only needs to form in time to get converted into the next object/nothing, and this allows for variability in timing. In addition, there is also a small degree of spatial independence. The inner engines' inner exhaust cancel out via the same interaction as in switchwave, said exhaust still cancels out if the halves are put one cell farther away from each other than usual. As a result, there are many variations of this Cordership.

	==See also==		==See also==

Book: rearrange and correct "orig version" section; minor viewer edits

2022-11-08T23:44:49Z

rearrange and correct "orig version" section; minor viewer edits

← Older revision		Revision as of 23:44, 8 November 2022
Line 29:		Line 29:

	== Bell's original version ==		== Bell's original version ==

			David Bell's original version has a minimum population of 134 [[cell]]s, which made it once the smallest known Cordership until it was superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{LinkGoLNews\|2005/08/new_sawtooth_patterns.html\|archivedate=20090720232132\|title=New Sawtooth Patterns\|date=August 10, 2005\|author=Dave Greene}}</ref> It can also be used to stabilize [[switchwave]] by pulling apart the two halves and inserting an arbitrary number of switch engines.

			A slight modification of this Cordership that is [[asymmetric]], with a minimum population of 136 cells, is also quite well-known and displayed below.

	{{EmbedViewer		{{EmbedViewer
	\|pname = 4enginecordership136		\|pname = 4enginecordership136
	\|position = center		\|position = center
	\|viewerconfig = #C [[ ZOOM 8 AUTOSTART X 4 Y 4 TRACKLOOP 96 -1/12 -1/12 THUMBSIZE 4 GPS 12 HEIGHT 750 WIDTH 750 ]]		\|viewerconfig = #C [[ ZOOM 8 AUTOSTART X 4 Y 4 TRACKLOOP 96 -1/12 -1/12 THUMBSIZE 2 GPS 12 HEIGHT 750 WIDTH 750 ]]
	\|caption = David Bell's 136-cell variant		\|caption = David Bell's asymmetric {{times\|77\|74}} 136-cell variant
	\|style = width:~~320px~~;		\|style = width:300px;
	\|apgcode = xq96_yzy3573w8aegvzyzyn33zyzyvoozyzy5442cia049uo239e4zyz848xgg8ggzyz111w166473zzykec6zgggoyhc8egzx8g8y72qqy011111z047146y6cf4ghzycckho01zy2oozzya66		\|apgcode = xq96_yzy3573w8aegvzyzyn33zyzyvoozyzy5442cia049uo239e4zyz848xgg8ggzyz111w166473zzykec6zgggoyhc8egzx8g8y72qqy011111z047146y6cf4ghzycckho01zy2oozzya66
	}}		}}
	David Bell's original version has a minimum population of 134 [[cell]]s, which made it once the smallest known Cordership until it was superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{LinkGoLNews\|2005/08/new_sawtooth_patterns.html\|archivedate=20090720232132\|title=New Sawtooth Patterns\|date=August 10, 2005\|author=Dave Greene}}</ref> It can also be used to stabilize [[switchwave]] by pulling apart the two halves and inserting an arbitrary number of switch engines.

	~~A slight modification of this Cordership that is asymmetric, with a minimum population of 136 cells, is also quite well-known and displayed to the left.~~

	== Simkin's extensible version ==		== Simkin's extensible version ==
Line 52:		Line 54:
	\|position = center		\|position = center
	\|caption = Two versions of Michael Simkin's extensible 4-engine Cordership		\|caption = Two versions of Michael Simkin's extensible 4-engine Cordership
			\|style = width:300px;
	}}		}}
	\|-		\|-
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	\|viewerconfig = #C [[ THUMBSIZE 4 WIDTH 1200 HEIGHT 900 ZOOM 0.75 STARTFROM 6500 ]]		\|viewerconfig = #C [[ THUMBSIZE 4 WIDTH 1200 HEIGHT 900 ZOOM 0.75 STARTFROM 6500 ]]
	\|caption = Infinite Cordership gun		\|caption = Infinite Cordership gun
			\|style = width:300px;
	}}		}}
	\|}		\|}
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	\|viewerconfig = #C [[ AUTOSTART ZOOM 8 X 4 Y 4 TRACKLOOP 96 -1/12 -1/12 THUMBSIZE 2 GPS 12 HEIGHT 750 WIDTH 750 ]]		\|viewerconfig = #C [[ AUTOSTART ZOOM 8 X 4 Y 4 TRACKLOOP 96 -1/12 -1/12 THUMBSIZE 2 GPS 12 HEIGHT 750 WIDTH 750 ]]
	\|caption = 108-cell 4-engine Cordership		\|caption = 108-cell 4-engine Cordership
	\|style = width:~~320px~~;		\|style = width:300px;
	\|apgcode = xq96_yzy7eh6ozyzya63y8cczyzy742szywgogy688gps8ggye33zyw266844y81zyzyg7zzye4e0ecgzyi3zyegz2559ago8x2544408tegzyf3y1gggzzy3cczzyb33		\|apgcode = xq96_yzy7eh6ozyzya63y8cczyzy742szywgogy688gps8ggye33zyw266844y81zyzyg7zzye4e0ecgzyi3zyegz2559ago8x2544408tegzyf3y1gggzzy3cczzyb33
	}}		}}

Confocal: formatting

2022-10-06T20:34:17Z

formatting

← Older revision		Revision as of 20:34, 6 October 2022
Line 30:		Line 30:
	== Bell's original version ==		== Bell's original version ==
	{{EmbedViewer		{{EmbedViewer
	\|pname = 4enginecordership136		\|pname = 4enginecordership136
	\|position = ~~left~~		\|position = center
	\|viewerconfig = #C [[ ZOOM 8 AUTOSTART X 4 Y 4 TRACKLOOP 96 -1/12 -1/12 THUMBSIZE 4 GPS 12 HEIGHT 750 WIDTH 750 ]]		\|viewerconfig = #C [[ ZOOM 8 AUTOSTART X 4 Y 4 TRACKLOOP 96 -1/12 -1/12 THUMBSIZE 4 GPS 12 HEIGHT 750 WIDTH 750 ]]
	\|caption = David Bell's 136-cell variant~~<br>~~		\|caption = David Bell's 136-cell variant
	\|apgcode = xq96_yzy3573w8aegvzyzyn33zyzyvoozyzy5442cia049uo239e4zyz848xgg8ggzyz111w166473zzykec6zgggoyhc8egzx8g8y72qqy011111z047146y6cf4ghzycckho01zy2oozzya66		\|style = width:320px;
			\|apgcode = xq96_yzy3573w8aegvzyzyn33zyzyvoozyzy5442cia049uo239e4zyz848xgg8ggzyz111w166473zzykec6zgggoyhc8egzx8g8y72qqy011111z047146y6cf4ghzycckho01zy2oozzya66
	}}		}}
	David Bell's original version has a minimum population of 134 [[cell]]s, which made it once the smallest known Cordership until it was superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{LinkGoLNews\|2005/08/new_sawtooth_patterns.html\|archivedate=20090720232132\|title=New Sawtooth Patterns\|date=August 10, 2005\|author=Dave Greene}}</ref> It can also be used to stabilize [[switchwave]] by pulling apart the two halves and inserting an arbitrary number of switch engines.		David Bell's original version has a minimum population of 134 [[cell]]s, which made it once the smallest known Cordership until it was superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{LinkGoLNews\|2005/08/new_sawtooth_patterns.html\|archivedate=20090720232132\|title=New Sawtooth Patterns\|date=August 10, 2005\|author=Dave Greene}}</ref> It can also be used to stabilize [[switchwave]] by pulling apart the two halves and inserting an arbitrary number of switch engines.
Line 45:		Line 46:
	The front and back halves of the Cordership can be produced by identical [[glider construction]]s, which was used in [[Goldtiger997]]'s stable [[glider]] to 4-engine cordership [[converter]] in September {{year\|2017}}.<ref name="post51093" /> [[Adam P. Goucher]] replaced two [[Snark]]s with [[semi-Snark]]s as [[toggle circuit]], so that for every input of the converter only one of two alternate halves is activated, and then connected the device to a [[sqrtgun]], whose output stream has increasing gaps between successive gliders; the result is a "[[gun]]" that fires infinite distinct Corderships.<ref name="post55400" />		The front and back halves of the Cordership can be produced by identical [[glider construction]]s, which was used in [[Goldtiger997]]'s stable [[glider]] to 4-engine cordership [[converter]] in September {{year\|2017}}.<ref name="post51093" /> [[Adam P. Goucher]] replaced two [[Snark]]s with [[semi-Snark]]s as [[toggle circuit]], so that for every input of the converter only one of two alternate halves is activated, and then connected the device to a [[sqrtgun]], whose output stream has increasing gaps between successive gliders; the result is a "[[gun]]" that fires infinite distinct Corderships.<ref name="post55400" />

	{\|		{\|style="margin:auto;width:420px;"
	\|{{EmbedViewer		\|{{EmbedViewer
	\|viewerconfig = #C [[ AUTOSTART GPS 12 ZOOM 2 WIDTH 640 HEIGHT 400 TRACKLOOP 96 -1/12 -1/12 ]]		\|viewerconfig = #C [[ AUTOSTART GPS 12 ZOOM 2 WIDTH 640 HEIGHT 400 TRACKLOOP 96 -1/12 -1/12 ]]
	\|pname = 4enginecorderships		\|pname = 4enginecorderships
	\|position = center		\|position = center
	\|caption = Two versions of Michael Simkin's~~<br>~~extensible 4-engine Cordership~~<br>~~		\|caption = Two versions of Michael Simkin's extensible 4-engine Cordership
	}}		}}
			\|-
	\|{{EmbedViewer		\|{{EmbedViewer
	\|pname = infinitecordershipgun		\|pname = infinitecordershipgun
	\|position = center		\|position = center
	\|viewerconfig = #C [[ THUMBSIZE 4 WIDTH 1200 HEIGHT 900 ZOOM 0.75 STARTFROM 6500 ]]		\|viewerconfig = #C [[ THUMBSIZE 4 WIDTH 1200 HEIGHT 900 ZOOM 0.75 STARTFROM 6500 ]]
	\|caption = Infinite Cordership gun~~<br />~~		\|caption = Infinite Cordership gun
	}}		}}
	\|}		\|}
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	{{EmbedViewer		{{EmbedViewer
	\|pname = 4enginecordership2		\|pname = 4enginecordership2
	\|position = center		\|position = center
	\|viewerconfig = #C [[ AUTOSTART ZOOM 8 X 4 Y 4 TRACKLOOP 96 -1/12 -1/12 THUMBSIZE 2 GPS 12 HEIGHT 750 WIDTH 750 ]]		\|viewerconfig = #C [[ AUTOSTART ZOOM 8 X 4 Y 4 TRACKLOOP 96 -1/12 -1/12 THUMBSIZE 2 GPS 12 HEIGHT 750 WIDTH 750 ]]
	\|caption = 108-cell 4-engine Cordership~~<br>~~		\|caption = 108-cell 4-engine Cordership
	\|apgcode = xq96_yzy7eh6ozyzya63y8cczyzy742szywgogy688gps8ggye33zyw266844y81zyzyg7zzye4e0ecgzyi3zyegz2559ago8x2544408tegzyf3y1gggzzy3cczzyb33		\|style = width:320px;
			\|apgcode = xq96_yzy7eh6ozyzya63y8cczyzy742szywgogy688gps8ggye33zyw266844y81zyzyg7zzye4e0ecgzyi3zyegz2559ago8x2544408tegzyf3y1gggzzy3cczzyb33
	}}		}}

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	==See also==		==See also==
	*~~[[:Category:Corderships~~\|~~List of Corderships]]~~		* {{CategoryLink\|Cordership variants}}

	==References==		==References==
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	}}</ref>		}}</ref>
	<ref name="post55400">{{LinkForumThread		<ref name="post55400">{{LinkForumThread
	\|format = ref		\|format = ref
	\|p = 55400		\|p = 55400
	\|title = Re: Stable signal converters		\|title = Re: Stable signal converters
	\|author = Adam P. Goucher		\|author = Adam P. Goucher
	\|date = January 22, 2018		\|date = January 22, 2018
	}}</ref>		}}</ref>
	<ref name="message785513679964733492">{{CiteDiscord		<ref name="message785513679964733492">{{CiteDiscord
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	==External links==		==External links==
	{{LinkCatagolue\|xq96_yzy1573w8aegvzyzyl33zyzytoozyzy3442cia049uo239e4zyx848xgg8ggzyx111w166473zzyi8k0szg0gyho4ooz331gy88mgy016663z8babcy6g38i1zybod1j3zy1ggy5131zy111zy9cc\|format=extended}}		* {{LinkCatagolue\|xq96_yzy1573w8aegvzyzyl33zyzytoozyzy3442cia049uo239e4zyx848xgg8ggzyx111w166473zzyi8k0szg0gyho4ooz331gy88mgy016663z8babcy6g38i1zybod1j3zy1ggy5131zy111zy9cc\|format=extended}}

	[[Category:Engineered spaceships]]		[[Category:Engineered spaceships]]

Atavoidirc: a

2022-07-16T21:28:07Z

← Older revision		Revision as of 21:28, 16 July 2022
Line 111:		Line 111:

	[[Category:Engineered spaceships]]		[[Category:Engineered spaceships]]
			[[Category:Patterns involving switch engines]]
	[[Category:Non-monotonic spaceships]]		[[Category:Non-monotonic spaceships]]
	{{Symmetry\|diagonal2}}		{{Symmetry\|diagonal2}}
	__NOTOC__		__NOTOC__

Confocal: choose archivedate with images

2022-07-05T10:57:34Z

choose archivedate with images

← Older revision		Revision as of 10:57, 5 July 2022
Line 36:		Line 36:
	\|apgcode = xq96_yzy3573w8aegvzyzyn33zyzyvoozyzy5442cia049uo239e4zyz848xgg8ggzyz111w166473zzykec6zgggoyhc8egzx8g8y72qqy011111z047146y6cf4ghzycckho01zy2oozzya66		\|apgcode = xq96_yzy3573w8aegvzyzyn33zyzyvoozyzy5442cia049uo239e4zyz848xgg8ggzyz111w166473zzykec6zgggoyhc8egzx8g8y72qqy011111z047146y6cf4ghzycckho01zy2oozzya66
	}}		}}
	David Bell's original version has a minimum population of 134 [[cell]]s, which made it once the smallest known Cordership until it was superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{LinkGoLNews\|2005/08/new_sawtooth_patterns.html\|title=New Sawtooth Patterns\|date=August 10, 2005\|author=Dave Greene}}</ref> It can also be used to stabilize [[switchwave]] by pulling apart the two halves and inserting an arbitrary number of switch engines.		David Bell's original version has a minimum population of 134 [[cell]]s, which made it once the smallest known Cordership until it was superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{LinkGoLNews\|2005/08/new_sawtooth_patterns.html\|archivedate=20090720232132\|title=New Sawtooth Patterns\|date=August 10, 2005\|author=Dave Greene}}</ref> It can also be used to stabilize [[switchwave]] by pulling apart the two halves and inserting an arbitrary number of switch engines.

	A slight modification of this Cordership that is asymmetric, with a minimum population of 136 cells, is also quite well-known and displayed to the left.		A slight modification of this Cordership that is asymmetric, with a minimum population of 136 cells, is also quite well-known and displayed to the left.

Confocal: LinkGoLNews (repair 1)

2022-06-01T07:58:05Z

LinkGoLNews (repair 1)

← Older revision		Revision as of 07:58, 1 June 2022
Line 36:		Line 36:
	\|apgcode = xq96_yzy3573w8aegvzyzyn33zyzyvoozyzy5442cia049uo239e4zyz848xgg8ggzyz111w166473zzykec6zgggoyhc8egzx8g8y72qqy011111z047146y6cf4ghzycckho01zy2oozzya66		\|apgcode = xq96_yzy3573w8aegvzyzyn33zyzyvoozyzy5442cia049uo239e4zyz848xgg8ggzyz111w166473zzykec6zgggoyhc8egzx8g8y72qqy011111z047146y6cf4ghzycckho01zy2oozzya66
	}}		}}
	David Bell's original version has a minimum population of 134 [[cell]]s, which made it once the smallest known Cordership until it was superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{~~cite web~~\|~~url=http://pentadecathlon.com/lifeNews/~~2005/08/new_sawtooth_patterns.html\|title=New Sawtooth Patterns\|date=August 10, 2005~~\|publisher=[[Game of Life News]]~~\|author=Dave ~~Greene‏‎\|accessdate=May 16, 2022~~}}</ref> It can also be used to stabilize [[switchwave]] by pulling apart the two halves and inserting an arbitrary number of switch engines.		David Bell's original version has a minimum population of 134 [[cell]]s, which made it once the smallest known Cordership until it was superseded by the [[2-engine Cordership]]. David Bell used this spaceship to create a small [[sawtooth]], [[sawtooth 260]].<ref>{{LinkGoLNews\|2005/08/new_sawtooth_patterns.html\|title=New Sawtooth Patterns\|date=August 10, 2005\|author=Dave Greene}}</ref> It can also be used to stabilize [[switchwave]] by pulling apart the two halves and inserting an arbitrary number of switch engines.

	A slight modification of this Cordership that is asymmetric, with a minimum population of 136 cells, is also quite well-known and displayed to the left.		A slight modification of this Cordership that is asymmetric, with a minimum population of 136 cells, is also quite well-known and displayed to the left.

GUYTU6J: /* Smaller versions */ please use even-integer zoom

2022-05-17T04:08:20Z

Smaller versions: please use even-integer zoom

← Older revision		Revision as of 04:08, 17 May 2022
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	== Smaller versions ==		== Smaller versions ==
	In September {{year\|2020}}, various smaller 4-engine Corderships were found by [[Ian07]] in an [[apgsearch]]-based diagonal-symmetric search.<ref>{{CiteCatagolue\|page=census/b3s23/stdin_2SE_D2_x/xq96\|title=Census\|accessdate=December 12, 2020}}</ref> Most notably, ~~{{LinkCatagolue\|xq96_yzy7eh6ozyzya63y8cczyzy742szywgogy688gps8ggye33zyw266844y81zyzyg7zzye4e0ecgzyi3zyegz2559ago8x2544408tegzyf3y1gggzzy3cczzyb33\|style=raw\|patternname=~~one of the results}} has only 108 cells in its minimum phase, much smaller than Bell's original version.<ref name="message785513679964733492" /> The search also found [[4-in-a-row Cordership]] that has a period of 192 instead of the usual 96.		In September {{year\|2020}}, various smaller 4-engine Corderships were found by [[Ian07]] in an [[apgsearch]]-based diagonal-symmetric search.<ref>{{CiteCatagolue\|page=census/b3s23/stdin_2SE_D2_x/xq96\|title=Census\|accessdate=December 12, 2020}}</ref> Most notably, one of the results has only 108 cells in its minimum phase, much smaller than Bell's original version.<ref name="message785513679964733492" /> The search also found [[4-in-a-row Cordership]] that has a period of 192 instead of the usual 96.

	{{EmbedViewer		{{EmbedViewer
	\|pname = 4enginecordership2		\|pname = 4enginecordership2
	\|position = center		\|position = center
	\|viewerconfig = #C [[ THUMBSIZE 2 ~~ZOOM 7~~ HEIGHT ~~600~~ ]]		\|viewerconfig = #C [[ AUTOSTART ZOOM 8 X 4 Y 4 TRACKLOOP 96 -1/12 -1/12 THUMBSIZE 2 GPS 12 HEIGHT 750 WIDTH 750 ]]
	\|caption = 108-cell 4-engine Cordership<br />		\|caption = 108-cell 4-engine Cordership<br>
			\|apgcode = xq96_yzy7eh6ozyzya63y8cczyzy742szywgogy688gps8ggye33zyw266844y81zyzyg7zzye4e0ecgzyi3zyegz2559ago8x2544408tegzyf3y1gggzzy3cczzyb33
	}}		}}