DFA Minimization (DFA Minimization)

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Description

Given a finite deterministic automaton (DFA) from a class $C$ of DFAs, determine its minimal automaton given by the equivalence relation on states.

Related Problems

Subproblem: Acyclic DFA Minimization, Cyclic Nontrivial SCCs DFA Minimization

Related: Cyclic Nontrivial SCCs DFA Minimization

Parameters

$n$: number of states
$d$: number of transitions
$k$: size of alphabet

Table of Algorithms

Name Year Time Space Approximation Factor Model Reference
Hopcroft's algorithm 1971 $O(kn \log n)$ $O(kn)$ Exact Deterministic Time & Space
Moore's algorithm 1956 $O(n^{2} k)$ $O(n)$ Exact Deterministic Time
Brzozowski's algorithm 1963 $O({2}^n)$ $O({2}^n)$ Exact Deterministic Time & Space

Time Complexity graph

DFA Minimization - Time.png

Space Complexity graph

DFA Minimization - Space.png

Pareto Decades graph

DFA Minimization - Pareto Frontier.png