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slide 1 courtesy costas busch - rpi1 reducibility slide 2 courtesy costas busch - rpi2 problem is reduced to problem if we can solve problem then we can solve problem slide…
slide 1 costas busch - rpi1 single final state for nfas slide 2 costas busch - rpi2 any nfa can be converted to an equivalent nfa with a single final state slide 3 costas…
slide 1 costas busch - rpi1 standard representations of regular languages regular languages dfas nfas regular expressions regular grammars slide 2 costas busch - rpi2 when…
slide 1fall 2006costas busch - rpi1 decidable languages slide 2 fall 2006costas busch - rpi2 recall that: a language is turing-acceptable if there is a turing machine that…
slide 1 fall 2006costas busch - rpi1 regular expressions slide 2 fall 2006costas busch - rpi2 regular expressions regular expressions describe regular languages example:…
mathematical preliminaries costas busch - rpi mathematical preliminaries sets functions relations graphs proof techniques costas busch - rpi a set is a collection of elements…
slide 1fall 2006costas busch - rpi1 context-free languages slide 2 fall 2006costas busch - rpi2 regular languages context-free languages slide 3 fall 2006costas busch - rpi3…
slide 1 fall 2005costas busch - rpi1 context-free languages slide 2 fall 2005costas busch - rpi2 regular languages slide 3 fall 2005costas busch - rpi3 regular languages…
slide 1 fall 2005costas busch - rpi1 pushdown automata pdas slide 2 fall 2005costas busch - rpi2 pushdown automaton -- pda input string stack states slide 3 fall 2005costas…
slide 1fall 2006costas busch - rpi1 a universal turing machine slide 2 fall 2006costas busch - rpi2 turing machines are hardwired they execute only one program a limitation…
slide 1 fall 2006costas busch - rpi1 undecidable problems (unsolvable problems) slide 2 fall 2006costas busch - rpi2 recall that: a language is decidable, if there is a turing…
the post correspondence problem costas busch - rpi some undecidable problems for context-free languages: is context-free grammar ambiguous? is ? are context-free grammars…
slide 1 costas buch - rpi1 simplifications of context-free grammars slide 2 costas buch - rpi2 a substitution rule substitute equivalent grammar slide 3 costas buch - rpi3…
slide 1fall 2003costas busch - rpi1 properties of context-free languages slide 2 fall 2003costas busch - rpi2 context-free languages are closed under: union is context free…
slide 1 fall 2006costas busch - rpi1 non-regular languages (pumping lemma) slide 2 fall 2006costas busch - rpi2 regular languages non-regular languages slide 3 fall 2006costas…
slide 1 fall 2005costas busch - rpi1 recursively enumerable and recursive languages slide 2 fall 2005costas busch - rpi2 definition: a language is recursively enumerable…
slide 1 courtesy costas buch - rpi1 simplifications of context-free grammars slide 2 courtesy costas buch - rpi2 a substitution rule substitute equivalent grammar slide 3…
slide 1 fall 2006costas busch - rpi1 more applications of the pumping lemma slide 2 fall 2006costas busch - rpi2 the pumping lemma: given a infinite regular language there…
slide 1 fall 2006costas busch - rpi1 deterministic finite automata and regular languages slide 2 fall 2006costas busch - rpi2 deterministic finite automaton (dfa) input tape…
costas busch - lsu1 time complexity costas busch - lsu2 consider a deterministic turing machine which decides a language costas busch - lsu3 for any string the computation…