Regular Expression The language accepted by finite automata can be easily described by simple expressions called Regular Expressions. It is the most…
Automata Tutorial


Ambiguity in Grammar A grammar is said to be ambiguous if there exists more than one leftmost derivation or more than one…

Chomsky Hierarchy Chomsky Hierarchy represents the class of languages that are accepted by the different machine. The category of language in Chomsky’s…

PDA Acceptance A language can be accepted by Pushdown automata using two approaches: 1. Acceptance by Final State: The PDA is said…

Theory of Automata Theory of automata is a theoretical branch of computer science and mathematical. It is the study of abstract machines…

Post Correspondence Problem In this section, we will discuss the undecidability of string and not of Turing machines. The undecidability of the…

Transition Diagram A transition diagram or state transition diagram is a directed graph which can be constructed as follows: There is a…

Basic Model of Turing machine The turning machine can be modelled with the help of the following representation. 1. The input tape…

Regular Expression The language accepted by finite automata can be easily described by simple expressions called Regular Expressions. It is the most…

Transition Table The transition table is basically a tabular representation of the transition function. It takes two arguments (a state and a…