Pushdown Automaton: CFL and the pumping lemma
Pushdown Automaton: CFL and the pumping lemma
Pushdown Automaton: CFL and the pumping lemma
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The Pumping Length<br />
• That means that every <strong>CFL</strong> has a special<br />
value called <strong>the</strong> <strong>pumping</strong> length such that all<br />
strings longer than <strong>the</strong> <strong>pumping</strong> length can<br />
be "pumped".<br />
• The string can be divided into 5 parts<br />
w=uvxyz.<br />
• The second <strong>and</strong> fourth can be pumped to<br />
produce additional words in L.<br />
• for all k0, w k = uv k xy k z can also be<br />
generated by <strong>the</strong> grammar.<br />
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