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CS3518 Languages and Computability Kees van Deemter k.vdeemter@abdn.ac.uk Lectures Monday14:00MT6 Tuesday11:00KC T2 Tutorials/Practicals Tuesday13:00-15:00 (one group) and 15:00-17:00 (another), in Meston 311

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Aims of the course The main question of the course: –What problems can be solved on a computer? –I.e., which problems are computable? Different perspectives on computability exist. In most of these, problems are seen as formal languages Hence, we start talking about formal languages –only the basics!

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Aims of the course Given that we know what a problem is, how does a solution look? A solution is an algorithm encoded in a programming language We consider 2 types of programming languages: –Imperative languages (e.g. JAVA) –Functional languages (e.g. HASKELL) –(If time allowed: logical languages, e.g. PROLOG)

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Aims of the course Hence the second and third topics of the course: Functional programming languages Imperative programming languages Finally, we shall present the basics of computability theory Just the basics!

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Course structure in more detail 1.Formal languages 2.Functional programming 3.Imperative Programming 4.Computability

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Course structure in more detail 1.Formal languages –finite state automata and regular languages 2.Functional programming –Theory: lambda calculus –Practice: Haskell 3.Imperative Programming –Turing machines 4.Computability

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History of CS3518 In previous years at Aberdeen, there were several courses in this area: –CS3511: Discrete Methods –CS3012: Formal language and Compilers –CD4026: Formal models of computation All three modules now merged into CS3518 –But some set theory and symbolic logic covered in year 1 (Foundations of Computing 1&2) –Please take a look at your old course notes

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Lets get started with formal languages

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