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I made a symmetric variant of life some years earlier than Nathan Thompson's 1997 "day and night" variant.
I found a usenet article from 1992 (see link below) that shows this variant, but I defined this variant already sometime in the 80's.
The rule can be described as 24678/3578, but it is more interesting to observe that both survival and birth happens on the same sums of "live" elements in a 3x3 block, i.e., that the rule can be described as 35789, where the numbes are the sums in a 3x3 block that means birth or survival for the middle cell.
In any case, the link below shows both a period-30 pattern and two spaceships.
This life variant is used in Scott Draves' "Bomb" program ( http://draves.org/bomb/).
Torben Mogensen (torbenm@diku.dk)
Are these contradictory? Omphaloscope » talk 21:10, 4 June 2006 (UTC)
The result of the move request was: move the disambiguation page, per the discussion below. This page had already been moved when I arrived, but this also appears to have been in accordance with the discussion. Dekimasu よ! 22:12, 20 November 2014 (UTC)
– No primary topic here more notable than all other topics combined at Day and Night redirect to Day & Night (disambiguation). The cellular automaton (rule) fails the ["Day & Night is..." search test] in Google Book search, while in vanilla Google the Pixar cartoon Day & Night (2010 film) would be be a clearer claimant for primary slot. Although the category says "Cellular automaton rules" the only other disambiguated article has (cellular automaton) as a dab. In ictu oculi ( talk) 07:43, 13 November 2014 (UTC)
![]() | This article is rated Stub-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||
|
I made a symmetric variant of life some years earlier than Nathan Thompson's 1997 "day and night" variant.
I found a usenet article from 1992 (see link below) that shows this variant, but I defined this variant already sometime in the 80's.
The rule can be described as 24678/3578, but it is more interesting to observe that both survival and birth happens on the same sums of "live" elements in a 3x3 block, i.e., that the rule can be described as 35789, where the numbes are the sums in a 3x3 block that means birth or survival for the middle cell.
In any case, the link below shows both a period-30 pattern and two spaceships.
This life variant is used in Scott Draves' "Bomb" program ( http://draves.org/bomb/).
Torben Mogensen (torbenm@diku.dk)
Are these contradictory? Omphaloscope » talk 21:10, 4 June 2006 (UTC)
The result of the move request was: move the disambiguation page, per the discussion below. This page had already been moved when I arrived, but this also appears to have been in accordance with the discussion. Dekimasu よ! 22:12, 20 November 2014 (UTC)
– No primary topic here more notable than all other topics combined at Day and Night redirect to Day & Night (disambiguation). The cellular automaton (rule) fails the ["Day & Night is..." search test] in Google Book search, while in vanilla Google the Pixar cartoon Day & Night (2010 film) would be be a clearer claimant for primary slot. Although the category says "Cellular automaton rules" the only other disambiguated article has (cellular automaton) as a dab. In ictu oculi ( talk) 07:43, 13 November 2014 (UTC)