A Concise Introduction to Languages and Machines by Alan P. Parkes PDF

By Alan P. Parkes

ISBN-10: 1848001207

ISBN-13: 9781848001206

This easy-to-follow textual content offers an available advent to the foremost subject matters of formal languages and summary machines inside computing device technology. the writer follows the profitable formulation of his first e-book in this topic, this time making those middle computing issues extra primary and delivering a very good beginning for undergraduates.

The e-book is split into components, Languages and Machines and Machines and Computation. the 1st half is anxious with formal language thought, because it applies to desktop technology, while half 2 considers the computational homes of the machines in additional element. this article is intentionally non-mathematical and, at any place attainable, hyperlinks thought to functional concerns, specifically the results for programming, computation and challenge fixing. Written in an off-the-cuff sort, this textbook assumes just a uncomplicated wisdom of programming at the a part of the reader.


• transparent motives of formal notation and jargon

• broad use of examples to demonstrate algorithms and proofs

• Pictorial representations of key concepts

• Chapter-opening overviews delivering an creation and assistance to every topic

• An introductory bankruptcy offers the reader with an effective overview

• End-of-chapter routines and solutions

This reader-friendly textbook has been written with undergraduates in brain and may be compatible to be used on classes masking formal languages, computability, automata idea and computational linguistics. it's going to additionally make an outstanding supplementary textual content for classes on set of rules complexity and compilers.

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Additional info for A Concise Introduction to Languages and Machines

Example text

BB, B ! bB, B ! bC, B ! cC, C ! cC, C ! cg, S ---N ---T ---P ---S 32 2. Elements of Formal Languages Using the conventions outlined earlier, we know that S is the start symbol, fS, A, Bg is the set of non-terminals (N), and fa, bg is the set of terminals (T). So we need not provide the full (N, T, P, S) definition of the grammar. As in our earlier example, the left-hand sides of the above productions all consist of single non-terminals. We see an example grammar that differs from this later in the chapter.

5) suggests if x > y then [if y < z then x := x þ 1 else x := x À 1]. 6) suggests if x > y then [if y < z then x := x þ 1] else x := x À 1. The ‘‘else part’’ belongs to different ‘‘if parts’’ in the two interpretations. 5 PARSE TREE 1: A derivation tree for a Pascal ‘‘if statement’’. 5. compiler made. For example, if x = 1, y = 1 and z = 2, then in case 1 the execution of our statement would result in x still having the value 1, while after execution in case 2, x would have the value 0. 6). g. in the manual, to explain which interpretation was assumed by 52 3.

Later in this book, we encounter an abstract machine, called a Turing machine, that specifies string operations, each operation involving the replacing of only one symbol by another, and we see that the machine is actually as powerful as the type 0 grammars. Indeed, the machine is capable of performing a wider range of computational tasks than even the most powerful real computer. However, we will not concern ourselves with these issues until later. In the next chapter, we encounter more of the fundamental concepts of formal languages: syntax, semantics and ambiguity.

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A Concise Introduction to Languages and Machines by Alan P. Parkes

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