Difference between revisions of "Eater 1"

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__NOTOC__{{Stilllife|type=eater|name=Eater 1|pname=eater1|c=7|bx=4|by=4|discoverer=Bill Gosper|discoveryear=1971|life105=true|life106=true|plaintext=true|rle=true|synthesis=2|synthesisRLE=true}}
{{Stilllife
'''Eater 1''' (or '''fishhook''' or simply '''eater''') was the first discovered [[eater]]. Its ability to eat various objects was discovered by [[:Category:Patterns found by Bill Gosper|Bill Gosper]] in [[:Category:Patterns found in 1971|1971]]. It is the smallest [[still life]] that is neither radially symmetric nor symmetric through a line, and it is the thirteenth most common still life, being less common than [[mango]] but more common than [[long barge]].<ref>{{cite web|url=http://wwwhomes.uni-bielefeld.de/achim/freq_top_life.html |title=Most seen natural occurring ash objects in Game of Life |author=Achim Flammenkamp |date=September 7, 2004 |accessdate=January 15, 2009}}</ref>
|name             = Eater 1
|pname           = eater1
|type2            = eater
|c               = 7
|bx               = 4
|by               = 4
|fc              = 11.0
|discoverer       = Bill Gosper
|discoveryear     = 1971
|rulemin          = B/S23
|rulemax          = B3678/S012345678
|rulespecial      = [[Conway's Game of Life|Conway Life]], [[HighLife]]
|isorulemin      = B/S2aek3nr
|isorulemax      = B2-ae34-an5-q678/S012345678
|synthesis        = 2
|synthesisRLE    = true
|plaintext       = true
|rle             = true
|apgcode          = xs7_178c
|niemiecid        = 7et
|pentadecathlonid = 7.3
}}
'''Eater 1''' (or '''fishhook'''<ref>{{citeLifeline|vol=2}}</ref> or simply '''eater''') was the first discovered [[eater]]. It was observed independently by several [[Conway's Game of Life|Life]] enthusiasts in {{year|1971}} as the smallest asymmetric [[still life]]. The name "fishhook", which is still occasionally used, was suggested by Clement A. Lessner III and William P. Webb.


It is extremely useful as an eater because in addition to being able to eat [[glider]]s, it can also eat [[blinker]]s, [[loaf|loaves]], [[pre-beehive]]s, [[lightweight spaceship]]s, and many other common patterns. It only takes four [[generation]]s to recover from being hit by a glider, and it is the smallest glider eater.
Its ability to eat various objects was discovered by [[Bill Gosper]] late in {{year|1971}}.  


Its pre-beehive eating reaction is used in the [[period]] [[:Category:Oscillators with period 12|12]] [[oscillator]] [[dinner table]].
It only takes four [[generation]]s to recover from being hit by a [[glider]], making it the fastest-recovering and also smallest glider eater. As such, it appears as a stabilizer at the corner of dozens of [[oscillator]]s including [[36P22]], [[buckaroo]], [[P54 shuttle]], [[pentoad]], [[pre-pulsar shuttle 47]], and [[snacker]] due to its ability to change the evolution of nearby objects without being affected itself.


==Image gallery==
The tail and head of the eater can also function as a [[boat-bit]].
{|
 
This pattern can also be seen as a [[Pattern naming|trans]] version of the [[bookend]].
 
==[[List of common still lifes|Commonness]]==
Eater 1 is the thirteenth most common still life in [[Achim Flammenkamp's census]], being less common than [[mango]] but more common than [[long barge]].<ref>{{citeAchim|accessdate=January 15, 2009}}</ref> It is also the seventeenth most common object on [[Adam P. Goucher]]'s [[Catagolue]]. It is the third most common 7-bit still life, being less common than the [[long boat]] but more common than the [[python]].<ref>{{citeCatagolueStats|June 24, 2016}}</ref> It is the rarest object in [[Catagolue]] for which a 2-[[glider]] [[synthesis]] is known.
 
==Eating reactions==
Eater 1 is extremely useful as an eater because in addition to being able to eat [[glider]]s, it can also eat [[blinker]]s, [[lightweight spaceship]]s, [[loaf|loaves]], [[middleweight spaceship]]s, [[pre-beehive]]s, [[R-bee]]s and many other patterns, as shown below. Its tail can be used as a [[rock]] that eats an unnamed 7-[[cell]] [[polyplet]]. Its pre-beehive eating reaction is used in the {{period|12}} oscillator [[dinner table]].
 
{| align="center" |
|-
|-
|[[Image:eater1_glider.png|framed|left|An eater 1 about to eat a glider<br />{{JavaRLE|eater1withglider|brief}}]]
|[[Image:eater1_eating.png|framed|center|Some eater 1s about to eat several different objects<br />{{JavaRLE|eater1reactions}}]]
|[[Image:eater1_blinker.png|framed|left|An eater 1 about to eat a blinker<br />{{JavaRLE|eater1withblinker|brief}}]]
|[[Image:eater1_loaf.png|framed|left|An eater 1 about to eat a loaf<br />{{JavaRLE|eater1withloaf|brief}}]]
|[[Image:eater1_prebeehive.png|framed|left|An eater 1 about to eat a pre-beehive<br />{{JavaRLE|eater1withprebeehive|brief}}]]
|}
|}


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*[[Eater 4]]
*[[Eater 4]]
*[[Eater 5]]
*[[Eater 5]]
*[[List of common still lifes]]


==References==
==References==
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==External links==
==External links==
*[http://www.argentum.freeserve.co.uk/lex_e.htm#eater1 Eater 1] at the Life Lexicon
{{LinkLexicon|lex_e.htm#eater1}}
[[Category:Still lifes]][[Category:Strict still lifes]][[Category:Strict still lifes with 7 cells]]
{{LinkWeisstein|Fishhook.html|patternname=Fishhook}}
{{LinkCatagolue|xs7_178c}}
{{LinkNiemiec|p1.htm#p1-7|patternname=The 4 seven-bit still-lifes}}
 
__NOTOC__

Revision as of 19:13, 28 December 2019

Eater 1
x = 4, y = 4, rule = B3/S23 2o$obo$2bo$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]]
View static image
Pattern type Strict still life
Eater
Number of cells 7
Bounding box 4 × 4
Frequency class 11.0
Discovered by Bill Gosper
Year of discovery 1971

Eater 1 (or fishhook[1] or simply eater) was the first discovered eater. It was observed independently by several Life enthusiasts in 1971 as the smallest asymmetric still life. The name "fishhook", which is still occasionally used, was suggested by Clement A. Lessner III and William P. Webb.

Its ability to eat various objects was discovered by Bill Gosper late in 1971.

It only takes four generations to recover from being hit by a glider, making it the fastest-recovering and also smallest glider eater. As such, it appears as a stabilizer at the corner of dozens of oscillators including 36P22, buckaroo, P54 shuttle, pentoad, pre-pulsar shuttle 47, and snacker due to its ability to change the evolution of nearby objects without being affected itself.

The tail and head of the eater can also function as a boat-bit.

This pattern can also be seen as a trans version of the bookend.

Commonness

Eater 1 is the thirteenth most common still life in Achim Flammenkamp's census, being less common than mango but more common than long barge.[2] It is also the seventeenth most common object on Adam P. Goucher's Catagolue. It is the third most common 7-bit still life, being less common than the long boat but more common than the python.[3] It is the rarest object in Catagolue for which a 2-glider synthesis is known.

Eating reactions

Eater 1 is extremely useful as an eater because in addition to being able to eat gliders, it can also eat blinkers, lightweight spaceships, loaves, middleweight spaceships, pre-beehives, R-bees and many other patterns, as shown below. Its tail can be used as a rock that eats an unnamed 7-cell polyplet. Its pre-beehive eating reaction is used in the period-12 oscillator dinner table.

Some eater 1s about to eat several different objects
Download RLE: click here

See also

References

  1. ↑ Robert Wainwright (June 1971). Lifeline, vol 2.
  2. ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  3. ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.

External links

Template:LinkWeisstein


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