THEORY OF COMPUTATION

This document contains well-organized, easy-to-understand class notes on Theory of Computation (TOC), designed specifically for undergraduate computer science students (B.Tech CSE). These notes cover all the essential concepts, definitions, diagrams, and solved examples required to understand and prepare for university exams, competitive exams (like GATE), and semester tests. Topics Covered: Introduction to Automata Theory Finite Automata (DFA, NFA, ε-NFA) Conversion: NFA to DFA, ε-NFA to NFA Kleene Closure and Positive Closure Regular Expressions and their Equivalence Transition Tables and Diagrams Language Recognition and Acceptance Minimized DFA (State Minimization Techniques) Grammar Types and Derivations Context-Free Grammar (CFG) Pushdown Automata (basic overview if included) Turing Machines (if covered) Decidability and Undecidability Important Shortcuts and Key Formulas