Difference between revisions of "OCA:DryLife"
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name = DryLife  name = DryLife  
imgname = drylife  imgname = drylife  
−  char =  +  char = Explosive 
b = 37  b = 37  
s = 23  s = 23  
+  ruleinteger = 6280  
+  reversal = B0123478/S0234678  
}}  }}  
'''DryLife''' is a [[cellular automaton#Wellknown Lifelike cellular automataLifelike cellular automaton]] in which [[cell]]s survive from one generation to the next if they have 2 or 3 [[neighbours]], and are born if they have 3 or 7 neighbours.  '''DryLife''' is a [[cellular automaton#Wellknown Lifelike cellular automataLifelike cellular automaton]] in which [[cell]]s survive from one generation to the next if they have 2 or 3 [[neighbours]], and are born if they have 3 or 7 neighbours.  
==Patterns==  ==Patterns==  
−  +  {{EmbedViewer  
+  pname = drylifeflowergarden  
+  position = right  
+  caption = The flower garden  
+  }}  
DryLife is so named because the [[standard spaceship]]s from [[Conway's Lifenormal life]]; [[lightweight spaceship]], [[middleweight spaceship]], and [[heavyweight spaceship]] — also known as "fishes" — do not work, though the glider does. Some other spaceships, such as the [[weekender]] and [[loafer]], work in this rule. The [[copperhead]] evolves into the closely related c/10 ''goldenhead'', differing from copperhead by two cells in one phase.  DryLife is so named because the [[standard spaceship]]s from [[Conway's Lifenormal life]]; [[lightweight spaceship]], [[middleweight spaceship]], and [[heavyweight spaceship]] — also known as "fishes" — do not work, though the glider does. Some other spaceships, such as the [[weekender]] and [[loafer]], work in this rule. The [[copperhead]] evolves into the closely related c/10 ''goldenhead'', differing from copperhead by two cells in one phase.  
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A new speed allowed by DryLife is 9c/28 orthogonal. Technology travelling at this speed relies on the [[Rpentomino]]. There is a small 9c/28 orthogonal [[pond]] puffer, and a 9c/28 spaceship. [[Gun]]s and [[breeder]]s have been constructed that fire spaceships and [[rake]]s of this speed respectively.  A new speed allowed by DryLife is 9c/28 orthogonal. Technology travelling at this speed relies on the [[Rpentomino]]. There is a small 9c/28 orthogonal [[pond]] puffer, and a 9c/28 spaceship. [[Gun]]s and [[breeder]]s have been constructed that fire spaceships and [[rake]]s of this speed respectively.  
−  The "flower garden", a common constellation which evolves from [[honey farm]] predecessors, composed of  +  The "flower garden", a common constellation which evolves from [[honey farm]] predecessors, composed of two [[biboat]]s and two [[cismirrored Rbee]]s, is shown to the right. It also evolves when a [[pulsar]] is sabotaged.{{citation needed}} 
+  
+  ==Universality==  
+  There is a proof sketch of this rule's universality as well as an explicit [https://en.wikipedia.org/wiki/Rule_110 Rule 110] [[unit cell]].<ref>{{cite weburl=http://www.conwaylife.com/forums/viewtopic.php?f=11&t=2597&start=25#p62446title=List of the Turingcomplete totalistic lifelike CAauthor=Peter Naszvadiwork=ConwayLife.com forumsdate=August 7, 2018accessdate=May 17, 2019}}</ref> In the same topic on ConwayLife forums,<ref>{{cite weburl=http://conwaylife.com/forums/viewtopic.php?f=11&t=2597#p38167title=List of the Turingcomplete totalistic lifelike CAauthor=Peter Naszvadiwork=ConwayLife.com forumsdate=December 12, 2016accessdate=May 17, 2019}}</ref> there is a proofscheme covering all rules in the [[outertotalistic]] [[rulespace]] between [[B3/S23]] and B3678/S23678.  
+  
+  An explicit [https://en.wikipedia.org/wiki/Rule_110 Rule 110] [[unit cell]] construction<ref>{{cite weburl=http://www.conwaylife.com/forums/viewtopic.php?f=11&t=2597&start=25#p58579title=Explicit Rule110 Unit Cell Construction for DryLifeauthor=Peter Naszvadidate=March 29, 2018}}</ref> proves its Turingcompleteness; the pattern itself is basically a metapolyglot, covering some related cellular automata in which the pattern only differs in some parts (in this case, the guns).  
+  
+  ==References==  
+  <references />  
+  
+  ==External links==  
+  {{LinkEppsteinRuleb37s23}}  
+  {{LinkCatagolueRuleb37s23}}  
+  {{LinkForumThreadf=11t=2705title=Taming B37/S23}} 
Latest revision as of 21:23, 6 March 2020
DryLife  


Rulestring  23/37 B37/S23 


Rule integer  6280  
Character  Explosive  
Black/white reversal  B0123478/S0234678 
DryLife is a Lifelike cellular automaton in which cells survive from one generation to the next if they have 2 or 3 neighbours, and are born if they have 3 or 7 neighbours.
Patterns
DryLife is so named because the standard spaceships from normal life; lightweight spaceship, middleweight spaceship, and heavyweight spaceship — also known as "fishes" — do not work, though the glider does. Some other spaceships, such as the weekender and loafer, work in this rule. The copperhead evolves into the closely related c/10 goldenhead, differing from copperhead by two cells in one phase.
Two correctly spaced Bheptominoes (as in the twin bees shuttle) act as a c/2 orthogonal puffer.
A new speed allowed by DryLife is 9c/28 orthogonal. Technology travelling at this speed relies on the Rpentomino. There is a small 9c/28 orthogonal pond puffer, and a 9c/28 spaceship. Guns and breeders have been constructed that fire spaceships and rakes of this speed respectively.
The "flower garden", a common constellation which evolves from honey farm predecessors, composed of two biboats and two cismirrored Rbees, is shown to the right. It also evolves when a pulsar is sabotaged.^{[citation needed]}
Universality
There is a proof sketch of this rule's universality as well as an explicit Rule 110 unit cell.^{[1]} In the same topic on ConwayLife forums,^{[2]} there is a proofscheme covering all rules in the outertotalistic rulespace between B3/S23 and B3678/S23678.
An explicit Rule 110 unit cell construction^{[3]} proves its Turingcompleteness; the pattern itself is basically a metapolyglot, covering some related cellular automata in which the pattern only differs in some parts (in this case, the guns).
References
 ↑ Peter Naszvadi (August 7, 2018). "List of the Turingcomplete totalistic lifelike CA". ConwayLife.com forums. Retrieved on May 17, 2019.
 ↑ Peter Naszvadi (December 12, 2016). "List of the Turingcomplete totalistic lifelike CA". ConwayLife.com forums. Retrieved on May 17, 2019.
 ↑ Peter Naszvadi (March 29, 2018). "Explicit Rule110 Unit Cell Construction for DryLife".
External links
 DryLife at David Eppstein's Glider Database
 DryLife at Adam P. Goucher's Catagolue
 Taming B37/S23 (discussion thread) at the ConwayLife.com forums