Developments in Language Theory (DLT)

An International Conference Series under the auspices of the European Association for Theoretical Computer Science (EATCS)


The series of International Conferences Developments in Language Theory provides a forum for presenting current developments in formal languages and automata. Its scope is very general and includes, among others, the following topics and areas: combinatorial and algebraic properties of words and languages; grammars, acceptors and transducers for strings, trees, graphs, arrays; algebraic theories for automata and languages; codes; efficient text algorithms; symbolic dynamics; decision problems; relationships to complexity theory and logic; picture description and analysis; polyominoes and bidimensional patterns; cryptography; concurrency; cellular automata; bio-inspired computing; quantum computing.


The first Developments in Language Theory (DLT) conference was organized by G. Rozenberg and A. Salomaa in

  • Turku, Finland in 1993.

Since 1993, the DLT conferences were held in every odd year:

  • Magdeburg, Germany (1995),
  • Thessaloniki, Greece (1997),
  • Aachen, Germany (1999) and
  • Vienna, Austria (2001).

Since 2001, a DLT conference takes place in Europe in every odd year and outside Europe in every even year. The locations of DLT conferences since 2002 were:

Steering Committee

  • Marie-Pierre Béal (Marne-la-Vallée, France)
  • Mikołaj Bojańczyk (Warsaw, Poland)
  • Cristian S. Calude (Auckland, New Zealand)
  • Volker Diekert (Stuttgart, Germany)
  • Yo-Sub Han (Seoul, Republic of Korea)
  • Juraj Hromkovic (Zurich, Switzerland)
  • Oscar H. Ibarra (Santa Barbara, USA)
  • Nataša Jonoska (Tampa, USA)
  • Juhani Karhumäki (Turku, Finland), chair 2010-
  • Martin Kutrib (Giessen, Germany)
  • Giovanni Pighizzini (Milano, Italy)
  • Michel Rigo (Liège, Belgium)
  • Antonio Restivo (Palermo, Italy)
  • Wojciech Rytter (Warsaw, Poland)
  • Kai Salomaa (Kingston, Canada)
  • Shinnosuke Seki (Tokyo, Japan)
  • Mikhail Volkov (Ekaterinburg, Russia)
  • Takashi Yokomori (Tokyo, Japan)

Honorary members:

  • Grzegorz Rozenberg (Leiden, Netherlands)
  • Arto Salomaa (Turku, Finland)

Past Proceedings

Special Issues of DLT

DLT Award

A special DLT award was given to professors Arto Salomaa and Grzegorz Rozenberg during the 20th DLT symposium in Montreal in 2016. The award was given due to their distinguished contributions to automata theory and founding the DLT conference. The award consisted of a DLT Award diploma and an artistic glass work of an owl.

Salomaa Prize

As a continuation of the DLT Award, an annual prize, named as Salomaa Prize, was created in 2018. The first prize was awarded in the DLT symposium in Tokyo in 2018. The prize consists of a diploma and 2000 euros prize funded by the University of Turku, the home university of Arto Salomaa.

Call for Nominations 2019

There is an open call for nominations of the Salomaa Prize. A detailed nomination letter, following the instructions in the guidelines, should be sent to the chair of the prize committee:

Prof. Mikhail Volkov
Institute of Natural Sciences and Mathematics
Ural Federal University
Ekaterinburg, Russia

The nominations can be sent either by email or by ordinary mail. The deadline for the nominations is April 15, 2019.

Prize Committee 2019

The selection of the winner is decided by a three person international selection committee which is appointed by the steering committee of the conference series Developments in Language Theory. The selection should be approved by the steering committee. The term of the committee members is three years, and a member is a chair of the committee in his/her last year of the term. The committee is allowed to split the prize, as well as to decide that no prize is given in a particular year.

The 2019 prize committee consists of

Mikhail Volkov (chair), Ural Federal University, Russia
Juhani Karhumäki, University of Turku, Finland
Dominique Perrin, University of Marne la Vallee, France

The Salomaa Prize 2018 was given to Dr. Jean-Éric Pin

The first international Salomaa Prize was given recently to Dr. Jean-Éric Pin from Paris. The prize ceremonies took place in Tokyo, in the annual DLT (Developments in Language theory) conference.

Jean-Éric Pin is one of the leading researchers in automata theory. He has published a number of fundamental contributions, in particular in algebraic automata theory, during his forty-year career. Currently he is editing a two-volume 1500-page Handbook on Automata.

The Prize winner was selected by Salomaa Prize committee consisting of Juhani Karhumäki (chair), Dominique Perrin and Mikhail Volkov. The award consists of a diploma and 2000 euros prize money. The award was funded by the University of Turku.

The Salomaa Prize winner Jean-Éric Pin (middle) with award committee members Mikhail Volkov and Juhani Karhumäki.
Dr. Jean-Éric Pin giving his speech.