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|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}} | ||
'''Pre-pulsar spaceship''' (or '''PPS''' for short) is any of three different [[period]] [[:Category:Spaceships with period 30|30]] [[ | '''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. | ||
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 a period [[:Category:Spaceships with period 15|15]] 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 [[:Category:Patterns found by David Bell|David Bell]] in May [[:Category:Patterns found in 1998|1998]] and was based on a period [[:Category:Spaceships with period 15|15]] pre-pulsar spaceship found by [[:Category:Patterns found by Noam Elkies|Noam Elkies]] in December [[:Category:Patterns found in 1997|1997]]. |
Revision as of 06:55, 10 August 2009
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 | Unknown | ||||||
Speed | c/5 | Unknown | ||||||
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 a period 15 pre-pulsar spaceship found by Noam Elkies in December 1997.
The asymmetric pre-pulsar spaceship (or APPS for short, shown below) was found by Alan Hensel, also in May 1998.
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 glide symmetric.
Image gallery
External links
- Pre-pulsar spaceship at the Life Lexicon
- 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
- Spaceships
- Spaceships with period 30
- Orthogonal spaceships
- Spaceships with speed c/5
- Spaceships with heat between 130 and 139
- Patterns found by Alan Hensel
- Non-monotonic spaceships