Difference between revisions of "Pre-pulsar spaceship"
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|isorulemin = B3/S23-c | |isorulemin = B3/S23-c | ||
|isorulemax = B3/S234c5jn6n7c8 | |isorulemax = B3/S234c5jn6n7c8 | ||
|synthesis = | |synthesis = 1133 | ||
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|apgcode = xq30_yq232x232zug1hmgc865da808ad568cgmh1guybug1hmgc865da808ad568cgmh1guz124w6yb6w421yb124w6yb6w421 | |apgcode = xq30_yq232x232zug1hmgc865da808ad568cgmh1guybug1hmgc865da808ad568cgmh1guz124w6yb6w421yb124w6yb6w421 | ||
|pentadecathlonid = 128P30H6V0.1 | |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 | '''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 [[ | 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''' | 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 | 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 [[ | [[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 | 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== | ||
Revision as of 14:09, 8 August 2019
| Pre-pulsar spaceship | |||||||||
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| Pattern type | Spaceship | ||||||||
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| 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 | ||||||||
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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
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 |
References
- ↑ Adam P. Goucher (March 8, 2019). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
External links
- Pre-pulsar spaceship at the Life Lexicon
- Asymmetric pre-pulsar spaceship at Adam P. Goucher's Catagolue (extended)
- 128P30H6V0.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Spaceships with between 120 and 129 cells
- Periodic objects with minimum population between 120 and 129
- Patterns with between 120 and 129 cells
- Patterns found by David Bell
- Patterns found in 1998
- Patterns that can be constructed with 1,000 or more gliders
- Spaceships
- Spaceships with period 30
- Orthogonal spaceships
- Spaceships with speed c/5
- Spaceships with unsimplified speed 6c/30
- Spaceships with heat between 130 and 139
- Spaceships with mod 30
- Patterns with bilateral orthogonal symmetry
- Patterns found by Alan Hensel
- Non-monotonic spaceships