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A note on closure properties of the classes of sets accepted by tape-bounded two-dimensional turing machines | Semantic Scholar
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proof verification - Non-deterministic 2-tape Turing Machine to accept the language $L=\{x\#y \mid x,y \in \{0,1\}^\star, x \text{ is contained in } y\}$ - Mathematics Stack Exchange
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Department of Computer Science and Technology – Raspberry Pi: Introduction: What is a Turing machine?
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