Pushdown Automata - Hampden-Sydney College
Pushdown Automata - Hampden-Sydney College
Pushdown Automata - Hampden-Sydney College
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Homework Review<br />
<strong>Pushdown</strong><br />
<strong>Automata</strong> -<br />
Equivalence<br />
to CFGs<br />
Robb T.<br />
Koether<br />
Homework<br />
Review<br />
Equivalence<br />
of PDAs and<br />
CFGs<br />
Proof ⇒<br />
Proof ⇐<br />
Long Example<br />
Short<br />
Example<br />
Assignment<br />
Solution<br />
The a’s can be placed anywhere.<br />
A ( or a [ can be read anywhere, but ( must eventually<br />
be balanced by ) and [ must eventually be balanced by<br />
].<br />
Use the stack to assure that the parentheses and<br />
brackets are properly matched.
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