
3. (10 points) Consider a pushdown automaton (PDA) with 2 stacks, where both stacks use the same alphabet I. and the transition function is of the following form : Q Г2-.PQ Гђ Show that PDA with 2 stacks can simulate any TM. (Hint: show how to use the two stacks of PDA to simulate a tape of a TM.) Provide an implementation-level definition of your PDA. Show transcribed image text
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