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Emulation of Turing Machines by Tag Systems and Register Machines

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In this Demonstration we show how Turing machines (TM) can be emulated by other simple systems, namely, register machines (RM) and tag systems (TS).

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There are three views.

1. A compressed register machine that emulates a Turing machine, which is obvious when one looks at the Turing machine in centered format.

2. How a register machine rule can emulate a Turing machine rule with requisite detailed emulation.

3. A tag system rule that emulates a Turing machine rule and the tag system that emulated a Turing machine.

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Contributed by: Abigail Nussey (March 2011)
Based on a program by: Todd Rowland
Open content licensed under CC BY-NC-SA

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For the details of how these emulations are conducted, see Stephen Wolfram's A New Kind of Science, pp. 670–672, Emulating Cellular Automata with Other Systems (NKS|Online).

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