| | - Pushdown Automata
An article with basic definitions and a proof that the languages accepted by PDA are context free languages. ...
http://homepages.fh-regensburg.de/~zar39030/in/node6.html
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- Automata Pushdown
We will now consider a new notion of automata pushdown automata PDA. PDAs are finite automatons with a stack, i.e. a data structure which can be used to store an arbitrary number of symbols hence PDAs have an infinite set of states but which can be o ...
http://www.cs.nott.ac.uk/~txa/g51mal.2001/notes/node29.html
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- The PushDown Automata
A PushDown Automaton is finitestate machine that it is equipped with a memory device that functions as a pushdown store. Pushdown automata are equivalent to contextfree grammars, also known as the Chomsky Type 2 grammars, which means that, given a co ...
http://web.uvic.ca/~ling48x/ling484/notes/pda.html
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- The Pushdown automaton Wikipedia article
Pushdown automata choose a transition by indexing a table by input signal, current state, and the top of the stack. Normal finite state machines just look at the input signal and the current state: they have no stack to work with. Pushdown automata a ...
http://en.wikipedia.org/wiki/Pushdown_automaton
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