Difference between revisions of "Pond"

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{{Stilllife|name=Pond|pname=pond|c=8|bx=4|by=4|discoverer=JHC group|discoveryear=1970|life105=true|life106=true|plaintext=true|rle=true|synthesis=2|synthesisRLE=true|rulemin=B/S2|rulemax=B35678/S012345678|rulespecial=[[Conway's Game of Life|Conway Life]], [[HighLife]]}}
{{Stilllife
'''Pond''' is an [[:Category:Strict still lifes with 8 cells|8]]-[[cell]] [[still life]] discovered by the [[JHC group]] in [[:Category:patterns found in 1970|1970]].<ref>{{CiteHickersonOscillators|accessdate=June 18, 2009}}</ref> It is the sixth most common still life, being slightly less common than [[tub]] and more common than [[ship]].<ref>{{citeAchim|accessdate=January 15, 2009}}</ref> It is the smallest [[lake]], followed by the 24-cell [[lake 2]].
|name             = Pond
|pname           = pond
|c               = 8
|bx               = 4
|by               = 4
|fc              = 5.0
|discoverer       = JHC group
|discoveryear     = 1970
|rulemin         = B/S2
|rulemax         = B35678/S012345678
|rulespecial     = [[Conway's Game of Life|Conway Life]], [[HighLife]]
|isorulemin      = B/S2k
|isorulemax      = B1e2-ae34-w5678/S012345678
|synthesis        = 2
|synthesisRLE    = true
|plaintext        = true
|rle              = true
|apgcode          = xs8_6996
|pentadecathlonid = 8.7
}}
'''Pond''' is an [[:Category:Strict still lifes with 8 cells|8]]-[[cell]] [[still life]] discovered by the [[JHC group]] in [[:Category:patterns found in 1970|1970]].<ref>{{CiteHickersonOscillators|accessdate=June 18, 2009}}</ref> It is the smallest [[lake]], followed by the 24-cell [[lake 2]].
 
It can be seen as a photonegative [[block]].
 
==[[List of common still lifes|Commonness]]==
The pond is the sixth most common still life in [[Achim Flammenkamp's census]], being slightly less common than [[tub]] and more common than [[ship]].<ref>{{citeAchim|accessdate=January 15, 2009}}</ref> It is also the nineth most common object on [[Adam P. Goucher]]'s [[Catagolue]].<ref>{{citeCatagolueStats|June 24, 2016}}</ref>


==Prepond==
==Prepond==
The '''prepond''' is an [[predecessor]] of the [[pond]]. It is important because it makes about [[HighLife#Change_in_Frequency|54%]] of the ponds that doesn't appear in any other Life-like rules (because, for some reason, the Prepond only turns into a pond in the Game of Life, and dies out / turns into active debris at other rules). [[File:Prepond.png|thumb|right|The Prepond.]] It dies out at [[HighLife]], which is the reason these 54% just aren't there, making the pond almost half as common.
[[File:Prepond.png|thumb|left|The Prepond.]]
 
The '''prepond''' is a common [[predecessor]] of the pond. It is important because it makes about [[HighLife#Change_in_Frequency|54%]] of ponds. The prepond turns into a pond in 32 Life-like rules, from B3/S23 to B378/S23678, but it dies out in [[HighLife]]. Consequently, the pond occurs more than twice as commonly in Game of Life than in HighLife.


==See also==
==See also==
*[[List of common still lifes]]
*[[Pond on pond]]
*[[Pond on pond]]
*[[Bi-pond]]
*[[Bi-pond]]
*[[Teardrop]]
*[[Teardrop]]
*[[Jaydot]]


==References==
==References==
Line 16: Line 41:


==External links==
==External links==
*[http://home.interserv.com/~mniemiec/still.htm#8-bit%20still Eight-bit still lifes] by Mark Niemiec
{{LinkWeisstein|Pond.html}}
{{LinkWeisstein|Pond.html}}
{{LinkLexicon|lex_p.htm#pond}}
{{LinkLexicon|lex_p.htm#pond}}
{{LinkCatagolue|xs8_6996}}
{{LinkNiemiec|p1.htm#p1-8|patternname=The 9 eight-bit still-lifes}}


[[Category:Patterns with D4 symmetry]]
{{Symmetry|full}}
__NOTOC__

Revision as of 19:51, 27 January 2019

Pond
x = 4, y = 4, rule = B3/S23 b2o$o2bo$o2bo$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]]
Pattern type Strict still life
Number of cells 8
Bounding box 4 × 4
Frequency class 5.0
Discovered by JHC group
Year of discovery 1970

Pond is an 8-cell still life discovered by the JHC group in 1970.[1] It is the smallest lake, followed by the 24-cell lake 2.

It can be seen as a photonegative block.

Commonness

The pond is the sixth most common still life in Achim Flammenkamp's census, being slightly less common than tub and more common than ship.[2] It is also the nineth most common object on Adam P. Goucher's Catagolue.[3]

Prepond

The Prepond.

The prepond is a common predecessor of the pond. It is important because it makes about 54% of ponds. The prepond turns into a pond in 32 Life-like rules, from B3/S23 to B378/S23678, but it dies out in HighLife. Consequently, the pond occurs more than twice as commonly in Game of Life than in HighLife.

See also

References

  1. Dean Hickerson's oscillator stamp collection. Retrieved on June 18, 2009.
  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