Difference between revisions of "C/5 orthogonal"

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|rake  = yes
|rake  = yes
|wick  = yes
|wick  = yes
|gun  = yes
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'''c/5 orthogonal''' is an orthogonal [[speed]] that is equivalent to one fifth of the speed of light.
'''c/5 orthogonal''' is an orthogonal [[speed]] that is equivalent to one fifth of the speed of light.


==Spaceships==
==Spaceships==
The first c/5 orthogonal [[spaceship]] to be discovered was the [[snail]], found by [[Tim Coe]] in January [[:Category:patterns found in 1996|1996]] using a program designed to utilize two CPUs. Since then many c/5 orthogonal spaceships have been found, most notably the [[spider]], discovered by [[David Bell]] in April [[:Category:patterns found in 1997|1997]], which is the smallest c/5 orthogonal spaceship known. [[Hartmut Holzwart]] found the first c/5 [[greyship]] in March [[:Category:patterns found in 2010|2010]].
The first c/5 orthogonal [[spaceship]] to be discovered was the [[snail]], found by [[Tim Coe]] in January {{year|1996}} using a program designed to utilize two CPUs. Since then many c/5 orthogonal spaceships have been found, most notably the [[spider]], discovered by [[David Bell]] in April {{year|1997}}, which is the smallest c/5 orthogonal spaceship known. [[Hartmut Holzwart]] found the first c/5 [[greyship]] in March {{year|2010}}.<ref name="post2051" />
[[Image:c5greyship.png|framed|right|A c/5 orthogonal greyship found by Hartmut Holzwart<br/>{{JavaRLE|c5greyship}}]]
[[Image:c5greyship.png|framed|right|A c/5 orthogonal greyship found by Hartmut Holzwart<br/>{{JavaRLE|c5greyship}}]]
All known c/5 orthogonal spaceships were [[period]] [[:Category:spaceships with period 5|5]] until the discovery of the [[P15 pre-pulsar spaceship]] by [[Noam Elkies]] in December 1997. David Bell found two related ships, the [[pre-pulsar spaceship|P30 pre-pulsar spaceships]] in May, [[:Category:patterns found in 1998|1998]]. In March 1998 David Bell found methods of constructing high period c/5 orthogonal spaceships by perturbing gliders with the edge [[spark]]s of spiders. [[Paul Tooke]] found the first period [[:Category:spaceships with period 10|10]] spaceship of this speed, [[160P10H2V0]], in November [[:Category:patterns found in 2004|2004]], and on January 4, [[:Category:patterns found in 2005|2005]], constructed an adjustable period [[rake]] with period 165 + 5N, which could easily be made into a spaceship by adding an extra spider to delete the outgoing [[glider]]s.
All known c/5 orthogonal spaceships were {{periodS|5}} until the discovery of the [[p15 pre-pulsar spaceship]] by [[Noam Elkies]] in December 1997. David Bell found two related ships, the [[pre-pulsar spaceship|p30 pre-pulsar spaceships]] in May, {{year|1998}}. In March 1998 David Bell found methods of constructing high period c/5 orthogonal spaceships by perturbing gliders with the edge [[spark]]s of spiders. [[Paul Tooke]] found the first period {{periodS|10|brief}} spaceship of this speed, [[160P10H2V0]], in November {{year|2004}}, and on January 4, {{year|2005}}, constructed an adjustable period [[rake]] with period 165 + 5N, which could easily be made into a spaceship by adding an extra spider to delete the outgoing [[glider]]s.


==Puffers==
==Puffers==
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In September 1997 David Bell discovered the first clean c/5 orthogonal rake. The rake had a period of 3960 and was based on the same mechanisms as the other known puffers. Many rakes of smaller periods were later formed, often by circulating more gliders in higher period rakes. On January 4, 2005 Paul Tooke constructed an adjustable forward rake of period 165+5N.
In September 1997 David Bell discovered the first clean c/5 orthogonal rake. The rake had a period of 3960 and was based on the same mechanisms as the other known puffers. Many rakes of smaller periods were later formed, often by circulating more gliders in higher period rakes. On January 4, 2005 Paul Tooke constructed an adjustable forward rake of period 165+5N.


==Wick Stretchers==
==Wickstretchers==
On March 12, [[:Category:patterns found in 2013|2013]] Matthias Merzenich found a c/5 orthogonal wickstretcher for a period-12 wick.
On March 12, {{year|2013}} Matthias Merzenich found a c/5 orthogonal wickstretcher for a period-12 wick.<ref name="post7570" />


==Guns==
On March 7, {{year|2019}}, [[Martin Grant]] found a 601-glider [[synthesis]] of spider, making it the first c/5 orthogonal spaceship to be synthesized.<ref name="post72705" /> On January 26, {{year|2020}}, [[Entity Valkyrie]] constructed a p11040 spider gun using an old 384-glider recipe, the first gun to fire a c/5 orthogonal spaceship and the largest gun of an elementary spaceship by far in both respect of bounding box (15426×15954) and population (263246).<ref name="post88186" />
==See also==
==See also==
*[[c/5 diagonal]]
*[[c/5 diagonal]]
*[[:Category:speeds|List of important speeds]]
*[[:Category:speeds|List of important speeds]]
*[[:Category:Spaceships with speed c/5|List of spaceships with speed c/5]]
*[[:Category:Puffers with speed c/5|List of puffers with speed c/5]]


==References==
==References==
<references>
<ref name="post2051">{{LinkForumThread
|format = ref
|title  = c/5 grey ship
|p      = 2051
|author = Hartmut Holzwart
|date  = March 22, 2010
}}</ref>
<ref name="post7570">{{LinkForumThread
|format = ref
|title  = c/5 wickstretcher
|p      = 7570
|author = Matthias Merzenich
|date  = March 12, 2013
}}</ref>
<ref name="post72705">{{LinkForumThread
|format = ref
|title  = Re: Small Spaceship Syntheses
|p      = 72705
|author = Martin Grant
|date  = March 7, 2019
}}</ref>
<ref name="post88186">{{LinkForumThread
|format = ref
|title  = Re: Small Spaceship Syntheses
|p      = 88186
|author = Entity Valkyrie 2
|date  = January 26, 2020
}}</ref>
</references>
*David Bell's c/5 orthogonal object archive
*David Bell's c/5 orthogonal object archive
*Jason Summers' ''[http://entropymine.com/jason/life/status.html Game of Life Status page]''
*Jason Summers' ''[http://entropymine.com/jason/life/status.html Game of Life Status page]''
*{{CiteSummersPattern|name=jslife}}
*{{CiteSummersPattern|name=jslife}}
==External links==
{{LinkLexicon|lex_c.htm#c5spaceship|name=c/5 spaceship}}


{{DISPLAYTITLE:c/5 orthogonal}}
{{DISPLAYTITLE:c/5 orthogonal}}

Revision as of 22:08, 15 March 2020

c/5 orthogonal
Spider.png
Spaceship Yes
Puffer Yes
Rake Yes
Wickstretcher Yes
Gun Yes

c/5 orthogonal is an orthogonal speed that is equivalent to one fifth of the speed of light.

Spaceships

The first c/5 orthogonal spaceship to be discovered was the snail, found by Tim Coe in January 1996 using a program designed to utilize two CPUs. Since then many c/5 orthogonal spaceships have been found, most notably the spider, discovered by David Bell in April 1997, which is the smallest c/5 orthogonal spaceship known. Hartmut Holzwart found the first c/5 greyship in March 2010.[1]

A c/5 orthogonal greyship found by Hartmut Holzwart
Download RLE: click here

All known c/5 orthogonal spaceships were period-5 until the discovery of the p15 pre-pulsar spaceship by Noam Elkies in December 1997. David Bell found two related ships, the p30 pre-pulsar spaceships in May, 1998. In March 1998 David Bell found methods of constructing high period c/5 orthogonal spaceships by perturbing gliders with the edge sparks of spiders. Paul Tooke found the first period 10 spaceship of this speed, 160P10H2V0, in November 2004, and on January 4, 2005, constructed an adjustable period rake with period 165 + 5N, which could easily be made into a spaceship by adding an extra spider to delete the outgoing gliders.

Puffers

The first c/5 orthogonal puffer to be discovered was found by Tim Coe in May, 1997. The puffer works by perturbing a reaction between a block and a glider using six spiders, so that the appropriate gliders are sent to the other side of the pattern where the process is repeated. Since then new methods of perturbing gliders have resulted in much cleaner puffers.

Rakes

In September 1997 David Bell discovered the first clean c/5 orthogonal rake. The rake had a period of 3960 and was based on the same mechanisms as the other known puffers. Many rakes of smaller periods were later formed, often by circulating more gliders in higher period rakes. On January 4, 2005 Paul Tooke constructed an adjustable forward rake of period 165+5N.

Wickstretchers

On March 12, 2013 Matthias Merzenich found a c/5 orthogonal wickstretcher for a period-12 wick.[2]

Guns

On March 7, 2019, Martin Grant found a 601-glider synthesis of spider, making it the first c/5 orthogonal spaceship to be synthesized.[3] On January 26, 2020, Entity Valkyrie constructed a p11040 spider gun using an old 384-glider recipe, the first gun to fire a c/5 orthogonal spaceship and the largest gun of an elementary spaceship by far in both respect of bounding box (15426×15954) and population (263246).[4]

See also

References

  1. Hartmut Holzwart (March 22, 2010). c/5 grey ship (discussion thread) at the ConwayLife.com forums
  2. Matthias Merzenich (March 12, 2013). c/5 wickstretcher (discussion thread) at the ConwayLife.com forums
  3. Martin Grant (March 7, 2019). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
  4. Entity Valkyrie 2 (January 26, 2020). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums

External links