Blog

Terminology related to TOC 1. Alphabet (Σ) It is a finite, non-empty set of symbols. For example: Σ = {a, b} 2. String It is a finite sequence of symbols from an alphabet. For example: abba 3. Language (L) It …

Difference between TOC in DFA and NFA  Slno Similarities 1. Both are transition functions of automata. 2. Both have same power. 3. Slno DFA NFA/NDFA 1. Stands for “Deterministic Finite Automata”. Stands for “Non-deterministic Finite Automata”. 2. No empty string …

Click this link for full details

Introduction Recursive Function Theory is a branch of the theory of computation that studies computable functions, that is, functions that can be calculated using a finite procedure or algorithm. It provides a mathematical foundation for understanding what problems can be …

Introduction The concept of Chomsky Classification was developed by linguist Noam Chomsky in 1956. The Chomsky Classification is also known as the Chomsky hierarchy. Definition The Chomsky Classification is a hierarchy that categorizes grammars and languages into four types based on their …

Introduction The Turing Machine (TM) was proposed by Alan Turing (1936). Definition A Turing Machine is an abstract machine or theoretical computational model that manipulates symbols on an infinite tape according to a set of rules. A Turing Machine is defined in a 7-tuple …

Introduction A Push-Down Automata (PDA) is a type of automaton (abstract machine) used in the theory of computation.  Definition Pushdown automata are an abstract computational model that uses a stack to recognize context-free languages. A Push-Down Automaton is a finite …

Introduction A Context-Free Grammar (CFG) is a formal system that provides a precise way to define valid strings in a language. Definition A Context-Free Grammar (CFG) is a formal grammar used to define context-free languages, where each production rule has …

Introduction The Pumping Lemma states that every regular language has a pumping length such that sufficiently long strings can be decomposed and repeated while remaining in the language. Definition The Pumping Lemma is a powerful theoretical tool that helps identify …

Introduction A language is regular if and only if it can be accepted by a finite automaton. Finite Automata (FA) is the simplest computational model/abstract machine in the Theory of Computation (TOC). Finite Automata form TOC’s base, and are extended …