Difference between revisions of "Pre-pulsar spaceship"

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{{Spaceship|name=Pre-pulsar spaceship|pname=prepulsarspaceship|dir=Orthogonal|p=30|s=c/5|c=128|bx=73|by=14|h=131.5|discoverer=David Bell|discoveryear=1998|life105=true|life106=true|plaintext=true|rle=true|animated=true}}
{{Spaceship
'''Pre-pulsar spaceship''' (or '''PPS''' for short) is any of three different [[period]] [[:Category:Spaceships with period 30|30]] [[c/5 orthogonal|c/5]] orthogonal [[spaceship]]s in which a [[pre-pulsar]] is pushed by a pair of [[spider]]s. The back [[spark]]s of these spaceships can be used to perturb [[glider]]s in many different ways, allowing the easy construction of c/5 [[puffer]]s.
|name             = Pre-pulsar spaceship
|pname           = prepulsarspaceship
|c                = 128
|bx              = 73
|by              = 14
|dir             = Orthogonal
|p               = 30
|m                = 30
|s               = c/5
|z                = 6c/30
|h               = 131.5
|discoverer       = David Bell
|discoveryear     = 1998
|rulemin          = B3/S23
|rulemax          = B3/S238
|rulespecial      = [[Conway's Game of Life|Conway Life]]
|isorulemin      = B3/S23-c
|isorulemax      = B3/S234c5jn6n7c8
|synthesis        = 1133
|plaintext       = true
|rle             = true
|animated         = true
|apgcode          = xq30_yq232x232zug1hmgc865da808ad568cgmh1guybug1hmgc865da808ad568cgmh1guz124w6yb6w421yb124w6yb6w421
|pentadecathlonid = 128P30H6V0.1
|viewerconfig    = #C [[ GPS 5 ZOOM 7 TRACKLOOP 30 0 -1/5 ]]
}}
'''Pre-pulsar spaceship''' (or '''PPS''' for short) is any of three different {{periodS|30}} [[c/5 orthogonal]] [[spaceship]]s in which a [[pre-pulsar]] is pushed by a pair of [[spider]]s. The back [[spark]]s of these spaceships can be used to perturb [[glider]]s in many different ways, allowing the easy construction of c/5 [[puffer]]s.


The first pre-pulsar spaceship, the '''symmetric pre-pulsar spaceship''' (or '''SPPS''' for short, shown to the right) was found by [[:Category:Patterns found by David Bell|David Bell]] in May [[:Category:Patterns found in 1998|1998]] and was based on the [[P15 pre-pulsar spaceship]] found by [[:Category:Patterns found by Noam Elkies|Noam Elkies]] in December [[:Category:Patterns found in 1997|1997]].
The first pre-pulsar spaceship, the '''symmetric pre-pulsar spaceship''' (or '''SPPS''' for short, shown to the right) was found by [[David Bell]] in May {{year|1998}} and was based on the [[p15 pre-pulsar spaceship]] found by [[Noam Elkies]] in December {{year|1997}}.


The '''asymmetric pre-pulsar spaceship''' (or '''APPS''' for short, shown below) was found by [[:Category:Patterns found by Alan Hensel|Alan Hensel]], also in May 1998.
The '''asymmetric pre-pulsar spaceship''' (or '''APPS''', shown below) was found by [[Alan Hensel]], also in May 1998, based on a skewed version of the pre-pulsar.


The third period 30 pre-pulsar spaceship, shown below, is similar to the symmetric pre-pulsar spaceship but contains an extra [[T-tetromino]] between the spiders and is [[Types_of_spaceships#Glide_symmetric_spaceship|glide symmetric]].
The '''glide symmetric pre-pulsar spaceship''' (or '''GPPS''', shown below) was also found by David Bell in May 1998. It is similar to the symmetric pre-pulsar spaceship but contains an extra [[T-tetromino]] between the spiders and is [[Types_of_spaceships#Glide_symmetric_spaceship|glide symmetric]].
 
[[Martin Grant]]'s 601-glider [[spider]] synthesis resulted in a 1212-glider [[synthesis]] for the symmetric pre-pulsar spaceship on March 8, {{year|2019}}.<ref name="post72731" />
 
In June 1998, David Bell found reactions to convert between the symmetric and glide-symmetric forms of the p30 pre-pulsar spaceship.{{citation needed}}


==Image gallery==
==Image gallery==
Line 14: Line 44:
|[[Image:GlidesymmetricPPS.png|framed|left|The glide symmetric pre-pulsar spaceship.<br />{{JavaRLE|glidesymmetricpps}}]]
|[[Image:GlidesymmetricPPS.png|framed|left|The glide symmetric pre-pulsar spaceship.<br />{{JavaRLE|glidesymmetricpps}}]]
|}
|}
==References==
<references>
<ref name="post72731">{{LinkForumThread
|format = ref
|title  = Re: Small Spaceship Syntheses
|p      = 72731
|author = Adam P. Goucher
|date  = March 8, 2019
}}</ref>
</references>


==External links==
==External links==
*[http://www.argentum.freeserve.co.uk/lex_p.htm#pps Pre-pulsar spaceship] at the Life Lexicon
{{LinkLexicon|lex_p.htm#pps}}
{{LinkCatagolue|xq30_yq232x232zug1hmgc865da808ad568cgmh1guybug1hmgc865da808ad568cgmh1guz124w6yb6w421yb124w6yb6w421|patternname=Symmetric pre-pulsar spaceship}}
{{LinkCatagolue|xq30_g84wcybcw48gybsa188bggwggg0gggwggb881aszf1ghd162ckma202amkc261dhg1fyb304430103552x255301034403zyq8o8x262|patternname=Asymmetric pre-pulsar spaceship|format=extended}}
{{LinkCatagolue|xq30_yq232x232zug1hmgc865da808ad568cgmh1gux4c4y5ug1hmgc865da808ad568cgmh1guz124w6yb6w421yb124w6yb6w421|patternname=Glide symmetric pre-pulsar spaceship}}
{{LinkPentadecathlonObject|128P30H6V0.1}}
 
{{Symmetry|orthogonal2}}
[[Category:Patterns found by Alan Hensel]]
[[Category:Patterns found by Alan Hensel]]
[[Category:Non-monotonic_spaceships]]
[[Category:Non-monotonic_spaceships]]

Revision as of 14:09, 8 August 2019

Pre-pulsar spaceship
x = 69, y = 13, rule = B3/S23 31bo5bo$30b3o3b3o4$2b2o5b2o5b2o5b2o19b2o5b2o5b2o5b2o$o3bo3bo2bo3bo2bo 3bo3bo15bo3bo3bo2bo3bo2bo3bo3bo$o3bobob3o5b3obobo3bo15bo3bobob3o5b3obo bo3bo$o5b2o2b3ob3o2b2o5bo15bo5b2o2b3ob3o2b2o5bo$2ob3o15b3ob2o15b2ob3o 15b3ob2o$o25bo15bo25bo$bo3bo15bo3bo17bo3bo15bo3bo$2bo2bo15bo2bo19bo2bo 15bo2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 5 ZOOM 7 TRACKLOOP 30 0 -1/5 ]]
Pattern type Spaceship
Number of cells 128
Bounding box 73 × 14
Direction Orthogonal
Period 30
Mod 30
Speed c/5 | 6c/30
Heat 131.5
Discovered by David Bell
Year of discovery 1998

Pre-pulsar spaceship (or PPS for short) is any of three different period-30 c/5 orthogonal spaceships in which a pre-pulsar is pushed by a pair of spiders. The back sparks of these spaceships can be used to perturb gliders in many different ways, allowing the easy construction of c/5 puffers.

The first pre-pulsar spaceship, the symmetric pre-pulsar spaceship (or SPPS for short, shown to the right) was found by David Bell in May 1998 and was based on the p15 pre-pulsar spaceship found by Noam Elkies in December 1997.

The asymmetric pre-pulsar spaceship (or APPS, shown below) was found by Alan Hensel, also in May 1998, based on a skewed version of the pre-pulsar.

The glide symmetric pre-pulsar spaceship (or GPPS, shown below) was also found by David Bell in May 1998. It is similar to the symmetric pre-pulsar spaceship but contains an extra T-tetromino between the spiders and is glide symmetric.

Martin Grant's 601-glider spider synthesis resulted in a 1212-glider synthesis for the symmetric pre-pulsar spaceship on March 8, 2019.[1]

In June 1998, David Bell found reactions to convert between the symmetric and glide-symmetric forms of the p30 pre-pulsar spaceship.[citation needed]

Image gallery

The asymmetric pre-pulsar spaceship.
Download RLE: click here
The glide symmetric pre-pulsar spaceship.
Download RLE: click here

References

  1. Adam P. Goucher (March 8, 2019). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums

External links