A finite automaton (FA) is a simple idealized machine used to recognize …
A finite automaton (FA) is a simple idealized machine used to recognize patterns within input taken from some character set (or alphabet) C. The job of an FA is to accept or reject an input depending on whether the pattern defined by the FA occurs in the input. A finite automaton consists of:a finite set S of N statesa special start statea set of final (or accepting) statesa set of transitions T from one state to another, labeled with chars in CAs noted above, we can represent a FA graphically, with nodes for states, and arcs for transitions.We execute our FA on an input sequence as follows:Begin in the start stateIf the next input char matches the label on a transition from the current state to a new state, go to that new stateContinue making transitions on each input charIf no move is possible, then stopIf in accepting state, then accept
Automata Theory is a branch of computer science that deals with designing …
Automata Theory is a branch of computer science that deals with designing abstract self-propelled computing devices that follow a predetermined sequence of operations automatically. An automaton with a finite number of states is called a Finite Automaton. This is a brief and concise tutorial that introduces the fundamental concepts of Finite Automata, Regular Languages, and Pushdown Automata before moving onto Turing machines and Decidability.
Audience
This tutorial has been prepared for students pursuing a degree in any information technology or computer science related field. It attempts to help students grasp the essential concepts involved in automata theory.
Prerequisites
This tutorial has a good balance between theory and mathematical rigor. The readers are expected to have a basic understanding of discrete mathematical structures.
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