Understanding The Computation Process
The following illustrates how the above PDA computes on different input strings. The subscript from the step symbol is here omitted.
(a) Input string = 0011. There are various computations, depending on the moment the move from state to state is made. Only one of these is accepting.
- (i) . The final state is accepting, but the input is not accepted this way as it has not been read.
- (ii) . No further steps possible.
- (iii) . Accepting computation: ends in accepting state, while complete input has been read.
(b) Input string = 00111. Again there are various computations. None of these is accepting.
- (i) . The final state is accepting, but the input is not accepted this way as it has not been read.
- (ii) . No further steps possible.
- (iii) . The final state is accepting, but the input is not accepted this way as it has not been (completely) read.
Read more about this topic: Pushdown Automaton
Famous quotes containing the words computation and/or process:
“I suppose that Paderewski can play superbly, if not quite at his best, while his thoughts wander to the other end of the world, or possibly busy themselves with a computation of the receipts as he gazes out across the auditorium. I know a great actor, a master technician, can let his thoughts play truant from the scene ...”
—Minnie Maddern Fiske (1865–1932)
“That which endures is not one or another association of living forms, but the process of which the cosmos is the product, and of which these are among the transitory expressions.”
—Thomas Henry Huxley (1825–95)