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In cellular automata such as Conway's Game of Life, a breeder is a pattern that exhibits quadratic growth, by generating multiple copies of a secondary pattern, each of which then generates multiple copies of a tertiary pattern.〔(【引用サイトリンク】accessdate=2008-11-01 )〕 ==Classification== Breeders can be classed by the relative motion of the patterns. The classes are denoted by three-letter codes, which denote whether the primary, secondary and tertiary elements respectively are moving (M) or stationary (S). The four basic types are:〔 * SMM – A gun that fires out rakes. * MSM – A puffer that leaves guns in its wake. * MMS – A rake that fires out puffers. * MMM – A rake that fires out more rakes, such that there are no stationary elements. A spacefiller (which also undergoes quadratic growth) may be thought of as a fifth class of breeder. However it differs from a true breeder in that it expands a single island of cells, rather than creating independent objects. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Breeder (cellular automaton)」の詳細全文を読む スポンサード リンク
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