Pre-pulsar: Difference between revisions

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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, and is in fact the only known method for creating a period 29 oscillator. The pre-pulsar is also a vital component of the only known method for constructing period [[:Category:Oscillators with period 47|47]] 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, and is in fact the only known method for creating a period 29 oscillator. The pre-pulsar is also a vital component of the only known method for constructing period [[:Category:Oscillators with period 47|47]] oscillators, and a similar reaction is the key component in the [[168P22.1|first discovered period 22 oscillator]].


==Image gallery==
==Image gallery==

Revision as of 15:39, 9 April 2009

Pre-pulsar
x = 9, y = 3, rule = B3/S23 3o3b3o$obo3bobo$3o3b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
Pattern type Miscellaneous
Number of cells 16
Bounding box 9 × 3
Static symmetry Unspecified
Discovered by Unknown
Year of discovery Unknown

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, and is in fact the only known method for creating a period 29 oscillator. The pre-pulsar is also a vital component of the only known method for constructing period 47 oscillators, and a similar reaction is the key component in the first discovered period 22 oscillator.

A common four-generation predecessor of the pre-pulsar that consists of two T-tetrominoes
Download RLE: click here

See also