Relation To Backtracking
Nondeterministic PDAs are able to handle situations where more than one choices of action are available. In principle it is enough to create in every such case new automaton instances that will handle the extra choices. The problem with this approach is that in practice most of these instances quickly fail. This can severely affect the automaton's performance as the execution of multiple instances is a costly operation. Situations such as these can be identified in the design phase of the automaton by examining the grammar the automaton uses. This makes possible the use of backtracking in every such case in order to improve performance.
Read more about this topic: Pushdown Automaton
Famous quotes containing the words relation to and/or relation:
“It would be disingenuous, however, not to point out that some things are considered as morally certain, that is, as having sufficient certainty for application to ordinary life, even though they may be uncertain in relation to the absolute power of God.”
—René Descartes (1596–1650)
“Skepticism is unbelief in cause and effect. A man does not see, that, as he eats, so he thinks: as he deals, so he is, and so he appears; he does not see that his son is the son of his thoughts and of his actions; that fortunes are not exceptions but fruits; that relation and connection are not somewhere and sometimes, but everywhere and always; no miscellany, no exemption, no anomaly,—but method, and an even web; and what comes out, that was put in.”
—Ralph Waldo Emerson (1803–1882)