Slide 1Fall 2006Costas Busch - RPI1 Time Complexity Slide 2 Fall 2006Costas Busch - RPI2 Consider a deterministic Turing Machine which decides a language Slide 3 Fall 2006Costas…

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 Turing’s Thesis Slide 2 Fall 2006Costas Busch - RPI2 Turing’s thesis (1930): Any computation carried out by mechanical means can…

Slide 1 Fall 2003Costas Busch - RPI1 Decidability Slide 2 Fall 2003Costas Busch - RPI2 Recall: A language is decidable (recursive), if there is a Turing machine (decider)…

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 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…