Theory of Computation: Automata, Formal Languages, Computation and Complexity

A concise summary of the Springer book by K. R. Chowdhary

General overview

This textbook offers a modern, classroom‑tested introduction to the theory of computation targeted primarily at undergraduate computer science students. It balances formal definitions and proofs with pedagogy: learning outcomes, chapter summaries and many exercises to help students progress from fundamentals to more advanced topics. The text also highlights algebraic viewpoints, additional automata variants, and practical connections (for example, to parsing and compiler theory).

Contents & key themes

The book guides readers from mathematical preliminaries through the major models of computation and into decidability and complexity. Primary topics include:

Chapter / AreaMajor topics
PreliminariesSets, relations, functions, logic and proof techniques
Finite Automata & Regular LanguagesDeterministic & nondeterministic automata, regular expressions, minimization, closure properties
Context‑Free Grammars & Pushdown AutomataCFGs, normal forms, parsing, pushdown automata
Turing Machines & Chomsky HierarchyTuring machines, linear‑bounded automata, context‑sensitive languages
Decidability & UndecidabilityDecidable vs undecidable problems; reductions and classic undecidable problems
ComplexityTime/space resources, complexity classes such as P and NP, and related concepts

Strengths & novel aspects

The text includes several features that distinguish it from many standard references: attention to algebraic structure of automata, coverage of additional automata variants, practical applications (notably parsing and compiler‑related topics), and pedagogical scaffolding such as chapter summaries and plentiful exercises designed for classroom use.

Who it's for

Primarily undergraduate CS students taking courses in automata theory and formal languages. Selected advanced chapters are suitable for graduate students. Also useful as a compact reference for researchers and practitioners wanting clear explanations of core topics in decidability and complexity.