Question: which are true? 1 Turing Machines can move the head over the tape by more than one cell at each step of their operation. 2

which are true?
1Turing Machines can move the head over the tape by more than one cell at each step of their operation.
2Computation of a deterministic Turing Machine can be shown on a tree in contrast to computation of a Nondeterministic Turing Machine.
3Turing Machines and Lambda Calculus are not equivalent in power.
4A problem if two grammars are equivalent is not decidable.

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