Lecture 6.pptx

# Lecture 6.pptx - Automata Theory Lecture 6 Recap 1 Automata...

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Automata Theory Lecture 6

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Recap - 1 Computational problems Computational models Automata theory Decision problems Optimization problems Search problems …. Computational problems Sets Languages Regular languages Context free languages Recursive languages Recursively enumerable languages …. Languages If ∑ = {a, b} {}, {^}, {a}, {b} are regular. RL1 + RL1 is regular. RL1 RL2 is regular. RL* is regular Regular Languages If ∑ = {a, b} ^, a and b all are RE. RE1+RE2 is RE. RE1 RE2 is RE. RE* is RE. Regular Expression
Recap - 2 Computational problems Computational models Automata theory DFA , NFA, TG, GTG PDA TM, PM, nPDA Computational models If ∑ = {a, b} {}, {^}, {a}, {b} are regular. RL1 + RL1 is regular. RL1 RL2 is regular. RL* is regular Regular Languages If ∑ = {a, b} ^, a and b all are RE. RE1+RE2 is RE. RE1 RE2 is RE. RE* is RE. Regular Expression DFA

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Recap - 3 Problem Regular expression DFA
Regular expression - Definition
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