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 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 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 Costas Busch - RPI1 Standard Representations of Regular Languages Regular Languages DFAs NFAs Regular Expressions Regular Grammars Slide 2 Costas Busch - RPI2 When…

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 Costas Busch - RPI1 More Applications of the Pumping Lemma Slide 2 Costas Busch - RPI2 The Pumping Lemma: Given a infinite regular language there exists an integer…

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 2006Costas Busch - RPI1 Languages Slide 2 Fall 2006Costas Busch - RPI2 Language: a set of strings String: a sequence of symbols from some alphabet Example: Strings:…

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…