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• 12:42, 5 November 2022 Ssstephen talk contribs created page User:Ssstephen/Reading/Universality in Elementary Cellular Automata (Created page with "Because a system is universal, some of its properties are undecidable (will it become periodic, will a particular sequence occur) Because Turing machines are universal, if a compiler exists that can compile any data and program from a turing machine to another computer, then that computer is also universal Tag systems are universal ACDABBE --> DABBECCDD Cyclic tag systems can only have a two letter alphabet {Y,N}, but they can emulate tag systems so are also universal...")