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Talk:Day and Night (cellular automaton)

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.dk

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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.

http://groups-beta.google.com/group/comp.theory.cell-automata/browse_thread/thread/b043bc8a99c0ea9e/1e5c584f6bbf6dbd?q=torbenm+%2Bsymmetric+%2Blife&_done=%2Fgroups%3Fq%3Dtorbenm+%2Bsymmetric+%2Blife%26hl%3Den%26lr%3D%26safe%3Doff%26btnG%3DGoogle+Search%26&_doneTitle=Back+to+Search&d=&fwc=1

This life variant is used in Scott Draves' "Bomb" program (http://draves.org/bomb/).

Torben Mogensen (torbenm@diku.dk)

"Rule" or "automaton"?

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Are these contradictory? Omphaloscope » talk 21:10, 4 June 2006 (UTC)[reply]

Requested moves

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The following is a closed discussion of a requested move. Please do not modify it. Subsequent comments should be made in a new section on the talk page. Editors desiring to contest the closing decision should consider a move review. No further edits should be made to this section.

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)[reply]


– 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)[reply]

Amended RM template per 209.211.131.181 advice to move dab to Day and Night following others support In ictu oculi (talk) 02:00, 19 November 2014 (UTC)[reply]

The above discussion is preserved as an archive of a requested move. Please do not modify it. Subsequent comments should be made in a new section on this talk page or in a move review. No further edits should be made to this section.