'Initial stack symbol' diaporamas de présentation

Pushdown Automata PDAs

Pushdown Automata PDAs Pushdown Automaton -- PDA Input String Stack States Initial Stack Symbol Stack Stack stack head top bottom special symbol Appears at time 0 The States Pop symbol Input symbol Push symbol input stack top Replace input stack top Push input stack

2.17k views • 90 slides

Pushdown Automata PDAs

Pushdown Automata PDAs. Pushdown Automaton -- PDA. Input String. Stack. States. Initial Stack Symbol. Stack. Stack. stack head. top. bottom. special symbol. The States. Pop symbol. Input symbol. Push symbol. Alternatively. input. stack. top. Replace. input. stack. top.

1.09k views • 85 slides

Pumping Lemma

Pumping Lemma. Problem: Let B be the language of all palindromes over {0,1} containing an equal number of 0s and 1s. Show that B is not CFL Solution: We assume that B is a CFL and obtain a contradiction.

1.24k views • 64 slides

Pushdown Automata PDAs

Pushdown Automata PDAs. Pushdown Automaton -- PDA. Input String. Stack. States. Initial Stack Symbol. Stack. Stack. stack head. top. bottom. special symbol. The States. Pop symbol. Input symbol. Push symbol. input. stack. top. Replace. input. stack. top. Push. input.

542 views • 40 slides

Pushdown Automata

523 views • 31 slides

PDA: Sequence of moves

PDA: Sequence of moves. By Diana Castro. PDA: Sequence of moves for aaabbb. 1 st Move: (q 0, aaabbb , Z 0 )?. Initial State: q 0 Initial Stack Symbol: Z 0 Accepting State: q 3. Match the 1 st move with the table (q 0, aaabbb , Z 0 )?. Next Move. 1. (q 0, aaabbb , Z 0 )?.

257 views • 19 slides

Pushdown Automata

[Section 7.1]. Pushdown Automata. like NFA- ? but also has a stack transition takes the current state, the current input symbol, and the top-of-the-stack symbol (which is removed from the stack) and returns a state and a string to place in the stack

140 views • 12 slides