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theory of computation please show all steps and explanation A useless state in a PDA is a state that is never visited on any input

theory of computation

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please show all steps and explanation

A useless state in a PDA is a state that is never visited on any input string. Consider the problem of determining whether a PDA has any useless states: Show that the language UPDA-(P) | P is a PDA that has useless states is decidable

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