Difference between revisions of "Pre-pulsar"
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|discoverer = John Conway | |||
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The '''pre-pulsar''' is a common [[predecessor]] of the [[pulsar]]. It duplicates itself after 15 generations, although it fails to be a true [[replicator]] because of the way that the two copies then interact. | The '''pre-pulsar''' is a common [[predecessor]] of the [[pulsar]]. It duplicates itself after 15 generations, although it fails to be a true [[replicator]] because of the way that the two copies then interact. | ||
A pair of [[tub|tubs]] can be placed to eat half of the pre-pulsar as it replicates; this gives the [[period]] [[:Category:Oscillators with period 30|30]] [[oscillator]] [[Eureka]], where the pre-pulsar's replication becomes a movement back and forth. The replication of the pre-pulsar can also be made to occur in just 14 generations as half of it is eaten; this allows the construction of period [[:Category:Oscillators with period 28|28]] and period [[:Category:Oscillators with period 29|29]] oscillators | A pair of [[tub|tubs]] can be placed to eat half of the pre-pulsar as it replicates; this gives the [[period]] [[:Category:Oscillators with period 30|30]] [[oscillator]] [[Eureka]], where the pre-pulsar's replication becomes a movement back and forth. The replication of the pre-pulsar can also be made to occur in just 14 generations as half of it is eaten; this allows the construction of period [[:Category:Oscillators with period 28|28]] and period [[:Category:Oscillators with period 29|29]] oscillators. The pre-pulsar was a vital component in the construction of the first oscillators of periods {{period|26|brief}}, {{period|28|brief}}, {{period|29|brief}}, {{period|47|brief}}, and {{period|55|brief}}. | ||
A '''skewed pre-pulsar''' is like a pre-pulsar, however, the pre-traffic lights it is composed of are vertically skewed by two cells. Despite this it manages to replicate itself and becomes two skewed halves of a pulsar. This form, however, is unstable and so is not truly a pulsar predecessor, but it can be hassled similarly to a normal pre-pulsar by oscillators and spaceships. | A '''skewed pre-pulsar''' is like a pre-pulsar, however, the pre-traffic lights it is composed of are vertically skewed by two cells. Despite this it manages to replicate itself and becomes two skewed halves of a pulsar. This form, however, is unstable and so is not truly a pulsar predecessor, but it can be hassled similarly to a normal pre-pulsar by oscillators and spaceships. | ||
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==See also== | ==See also== | ||
*[[Newshuttle]] | *[[Newshuttle]] | ||
*[[pre-pulsar shuttle | *[[p26 pre-pulsar shuttle]] | ||
*[[ | *[[p28 pre-pulsar shuttle]] | ||
*[[ | *[[p29 pre-pulsar shuttle]] | ||
*[[ | *[[p47 pre-pulsar shuttle]] | ||
*[[p58 pre-pulsar shuttle]] | |||
*[[p55 pre-pulsar hassler]] | |||
*[[Pre-pulsar spaceship]] | *[[Pre-pulsar spaceship]] | ||
*[[Twirling T-tetsons 2]] | *[[Twirling T-tetsons 2]] | ||
Revision as of 09:08, 9 December 2019
| Pre-pulsar | |||||||
| View static image | |||||||
| Pattern type | Miscellaneous | ||||||
|---|---|---|---|---|---|---|---|
| Number of cells | 16 | ||||||
| Bounding box | 9 × 3 | ||||||
| Discovered by | John Conway | ||||||
| Year of discovery | 1970 | ||||||
| |||||||
The pre-pulsar is a common predecessor of the pulsar. It duplicates itself after 15 generations, although it fails to be a true replicator because of the way that the two copies then interact.
A pair of tubs can be placed to eat half of the pre-pulsar as it replicates; this gives the period 30 oscillator Eureka, where the pre-pulsar's replication becomes a movement back and forth. The replication of the pre-pulsar can also be made to occur in just 14 generations as half of it is eaten; this allows the construction of period 28 and period 29 oscillators. The pre-pulsar was a vital component in the construction of the first oscillators of periods 26, 28, 29, 47, and 55.
A skewed pre-pulsar is like a pre-pulsar, however, the pre-traffic lights it is composed of are vertically skewed by two cells. Despite this it manages to replicate itself and becomes two skewed halves of a pulsar. This form, however, is unstable and so is not truly a pulsar predecessor, but it can be hassled similarly to a normal pre-pulsar by oscillators and spaceships.
Other pre-pulsar like formations, such as 3 in a row instead of 2, also duplicate themselves like the others, but are not stable.
Image gallery
 A common four-generation predecessor of the pre-pulsar that consists of two T-tetrominoes Download RLE: click here |
 |
See also
- Newshuttle
- p26 pre-pulsar shuttle
- p28 pre-pulsar shuttle
- p29 pre-pulsar shuttle
- p47 pre-pulsar shuttle
- p58 pre-pulsar shuttle
- p55 pre-pulsar hassler
- Pre-pulsar spaceship
- Twirling T-tetsons 2
External links
- Pre-pulsar at the Life Lexicon