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A '''filter''' is any [[oscillator]] used to delete some but not all of the [[spaceship]]s in a stream. An example is the [[blocker]], which can be positioned so as to delete every second [[glider]] in a stream of period 8n+4, and can also do the same for [[LWSS]] streams. Other examples are the [[MW emulator]] and [[T-nosed p4]] (either of which can be used to delete every secondr LWSS in a stream of period 4n+2), the [[fountain]] (which does the same for MWSS streams) and a number of others, such as the [[pipsquirter 1|p6 pipsquirter]], the [[pentadecathlon]] and the [[two blockers hassling R-pentomino]] oscillator shown under {{LinkLexicon|style=raw|filename=lex_f.htm#factory|patternname=factory}}. | A '''filter''' is any [[oscillator]] used to delete some but not all of the [[spaceship]]s in a stream. An example is the [[blocker]], which can be positioned so as to delete every second [[glider]] in a stream of period 8n+4, and can also do the same for [[LWSS]] streams. Other examples are the [[MW emulator]] and [[T-nosed p4]] (either of which can be used to delete every secondr LWSS in a stream of period 4n+2), the [[fountain]] (which does the same for MWSS streams) and a number of others, such as the [[pipsquirter 1|p6 pipsquirter]], the [[pentadecathlon]] and the [[two blockers hassling R-pentomino]] oscillator shown under {{LinkLexicon|style=raw|filename=lex_f.htm#factory|patternname=factory}}. | ||
Filters can be used to make guns of very high periods without crossing | Filters can be used to make guns of very high periods without crossing two guns, for example, the [[period-20 glider gun]] can be made p40 by adding a [[blocker]], then p80 by adding [[Rich's p16]], and even p160 by adding [[68P32.1]]. | ||
== External links == | == External links == | ||
{{LinkLexicon|lex_f.htm#filter}} | {{LinkLexicon|lex_f.htm#filter}} | ||
Revision as of 01:43, 6 October 2019
A filter is any oscillator used to delete some but not all of the spaceships in a stream. An example is the blocker, which can be positioned so as to delete every second glider in a stream of period 8n+4, and can also do the same for LWSS streams. Other examples are the MW emulator and T-nosed p4 (either of which can be used to delete every secondr LWSS in a stream of period 4n+2), the fountain (which does the same for MWSS streams) and a number of others, such as the p6 pipsquirter, the pentadecathlon and the two blockers hassling R-pentomino oscillator shown under factory .
Filters can be used to make guns of very high periods without crossing two guns, for example, the period-20 glider gun can be made p40 by adding a blocker, then p80 by adding Rich's p16, and even p160 by adding 68P32.1.
External links
- Filter at the Life Lexicon