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Dec 18, 2016 · $\begingroup$ Part 1 is trivial because every standard Turing machine is also a modified Turing machine (argue why!). For part 2, it might help if you write down the formal definition of acceptance of a modified Turing machine and try to work from there (i.e. how to convert it so that you get the standard acceptance condition and then show that the two Turing machines accept the same language). $\endgroup$
May 18, 2015 · 1. You start by trying to simulate an arbitrary Turing machine using one that has the restriction you're interested in; if you fail, you try to prove that the restricted machine can't compute some function that an ordinary Turing machine can, or that it has some property that ordinary Turing machines don't. – David Richerby. May 18, 2015 at ...
NDTM is one of many variants of turing mahcine. For example, the classical (deterministic) Turing machine can be equipped with multiple heads and tapes, randomness or quantum states. It can also be constrained by a limited alphabet, limited tape or pre-determined head-movements (see here).
Apr 23, 2017 · To simulate two tapes Turing machine by single tape encode locations 1,3,5,7... to encode the first tape and locations 2,4,6... to encode second tape and also use symbol for the encoding of head positions.
1. The Turing machine is a theoretical computational model which is studied in undergraduate courses due to its simplicity and for historical reasons. Historically, the Turing machine was the first widely accepted definition of computation, and for many years, it was arguably the simplest definition to explain.
Nov 10, 2020 · Let us define an equal standard machine, M2. We would do so by describing how TM M1 works in the implementation level: If M1 moves to the right, do the same for M2 however mark the position with ‘ * ‘ transition to a new state at which the machine always moves to the right and then transitions to the original target of the RR transition. If ...
Jul 22, 2015 · Jul 23, 2015 at 1:10. @201044 Computability is the property of mathematical function (not of algorithm). A function is computable if there exist an algorithm to compute it i.e there exist some Turing machine to compute it. CPU is like a UTM where the CPU change the states based on the instruction read from memory.
However, quantum Turing machines are widely conjectured not to be polynomially equivalent to classical Turing machines: for example, factoring and discrete logarithm are "easy" for quantum Turing machines (solvable in polynomial time), while it is conjectured that they are "hard" for classical Turing machines (cannot be solved in polynomial time; though some people think that integer factoring might be solvable in polynomial time).
May 20, 2015 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Sep 14, 2012 · It's easy to see how a multi-track Turing machine can simulate a single-track Turing machine; it does so by ignoring all but the first track. But how does it work the other way? I need a specification of a transition function that does the job.
