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Notice that a PDA could have a move that does not read from the input (only performs stack operation and state transition). Therefore, it 1
Notice that a PDA could have a move that does not read from the input (only performs stack operation and state transition). Therefore, it 1 is possible for the PDA to run forever on some given input. Prove that there is an algorithm that answers whether, for a given PDA, there is an input word on which the PDA has an infinite execution
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