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The state complexity, respectively, nondeterministic state complexity of a regular language $L$ is the number of states of the minimal deterministic, respectively, of a minimal nondeterministic finite automaton for $L$. Some of the most…

Formal Languages and Automata Theory · Computer Science 2026-04-08 Arto Salomaa , Kai Salomaa , Taylor J. Smith

The state complexity of the result of a regular operation is often positively correlated with the number of distinct transformations induced by letters in the minimal deterministic finite automaton of the input languages. That is, more…

Formal Languages and Automata Theory · Computer Science 2018-09-07 Sylvie Davies

We survey recent results concerning the complexity of regular languages represented by their minimal deterministic finite automata. In addition to the quotient complexity of the language -- which is the number of its (left) quotients, and…

Formal Languages and Automata Theory · Computer Science 2017-02-17 Janusz A. Brzozowski

In this paper we consider block languages, namely sets of words having the same length, and study the deterministic and nondeterministic state complexity of several operations on these languages. Being a subclass of finite languages, the…

Formal Languages and Automata Theory · Computer Science 2024-09-12 Guilherme Duarte , Nelma Moreira , Luca Prigioniero , Rogério Reis

We investigate the nondeterministic state complexity of basic operations for suffix-free regular languages. The nondeterministic state complexity of an operation is the number of states that are necessary and sufficient in the worst-case…

Formal Languages and Automata Theory · Computer Science 2010-08-11 Yo-Sub Han , Kai Salomaa

We study the complexity of basic regular operations on languages represented by incomplete deterministic or nondeterministic automata, in which all states are final. Such languages are known to be prefix-closed. We get tight bounds on both…

Formal Languages and Automata Theory · Computer Science 2014-05-23 Kristína Čevorová , Galina Jirásková , Peter Mlynárčik , Matúš Palmovský , Juraj Šebej

The state complexity of basic operations on finite languages (considering complete DFAs) has been in studied the literature. In this paper we study the incomplete (deterministic) state and transition complexity on finite languages of…

Formal Languages and Automata Theory · Computer Science 2013-02-05 Eva Maia , Nelma Moreira , Rogério Reis

The past research on the state complexity of operations on regular languages is examined, and a new approach based on an old method (derivatives of regular expressions) is presented. Since state complexity is a property of a language, it is…

Formal Languages and Automata Theory · Computer Science 2009-07-28 Janusz Brzozowski

We examine deterministic and nondeterministic state complexities of regular operations on prefix-free languages. We strengthen several results by providing witness languages over smaller alphabets, usually as small as possible. We next…

Formal Languages and Automata Theory · Computer Science 2010-08-11 Galina Jirásková , Monika Krausová

In this paper we consider the state complexity of an operation on formal languages, root(L). This naturally entails the discussion of the monoid of transformations of a finite set. We obtain good upper and lower bounds on the state…

Group Theory · Mathematics 2007-05-23 Bryan Krawetz , John Lawrence , Jeffery Shallit

The state complexity of a regular language is the number of states in the minimal deterministic automaton accepting the language. The syntactic complexity of a regular language is the cardinality of its syntactic semigroup. The syntactic…

Formal Languages and Automata Theory · Computer Science 2010-10-19 Janusz Brzozowski , Yuli Ye

We investigate the state complexity of the upward and downward closure and interior operations on commutative regular languages. Then, we systematically study the state complexity of these operations and of the shuffle operation on…

Formal Languages and Automata Theory · Computer Science 2021-11-29 Stefan Hoffmann

We present a new characteristic of a regular ideal language called reset complexity. We find some bounds on the reset complexity in terms of the state complexity of a given language. We also compare the reset complexity and the state…

Formal Languages and Automata Theory · Computer Science 2014-04-11 Marina Maslennikova

This paper deals with the size complexity of minimal {\it two-way quantum finite automata} (2qfa's) necessary for operations to perform on all inputs of each fixed length. Such a complexity measure, known as state complexity of operations,…

Discrete Mathematics · Computer Science 2008-07-04 Daowen Qiu

The quotient complexity, also known as state complexity, of a regular language is the number of distinct left quotients of the language. The quotient complexity of an operation is the maximal quotient complexity of the language resulting…

Formal Languages and Automata Theory · Computer Science 2010-12-20 Janusz Brzozowski , Bo Liu

A language $L$ is the orthogonal catenation of languages $L_1$ and $L_2$ if every word of $L$ can be written in a unique way as a catenation of a word in $L_1$ and a word in $L_2$. We establish a tight bound for the state complexity of…

Formal Languages and Automata Theory · Computer Science 2009-04-23 Mark Daley , Michael Domaratzki , Kai Salomaa

In this paper we give a definition for the Kolmogorov complexity of a pure quantum state. In classical information theory the algorithmic complexity of a string is a measure of the information needed by a universal machine to reproduce the…

Quantum Physics · Physics 2007-05-23 C. Mora , H. J. Briegel

The state complexity of a regular language is the number of states in a minimal deterministic finite automaton accepting the language. The syntactic complexity of a regular language is the cardinality of its syntactic semigroup. The…

Formal Languages and Automata Theory · Computer Science 2017-01-16 Janusz A. Brzozowski , Marek Szykuła , Yuli Ye

We introduce a method for analyzing the complexity of natural language processing tasks, and for predicting the difficulty new NLP tasks. Our complexity measures are derived from the Kolmogorov complexity of a class of automata --- {\it…

cmp-lg · Computer Science 2016-08-31 Wlodek Zadrozny

We introduce a new measure on regular languages: their nondeterministic syntactic complexity. It is the least degree of any extension of the `canonical boolean representation' of the syntactic monoid. Equivalently, it is the least number of…

Formal Languages and Automata Theory · Computer Science 2021-01-12 Robert Myers , Stefan Milius , Henning Urbat
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