What is a deterministic push down automaton?

Special push down automaton just as powerful or not?

  • a pda which can decide on the next transition based also on a "peek" at the element in the bottom of the stack, but it can only do push/pop operation on the element in the top of the stack. is it more powerful than a regular pda or not, that is are there any languages it accepts which aren't cfg's?

  • Answer:

    I see things have changed in the decades since I've studied this ... How could an automaton NOT be more powerful if it has more information available to it? You may have better luck in a computer section of YA than a science section.

warda at Yahoo! Answers Visit the source

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