DCFS, the International Workshop on Descriptional Complexity of Formal Systems is an annual academic conference in the field of computer science.

Beginning with the 2011 edition, the proceedings of the workshop appear in the series Lecture Notes in Computer Science. Already since the very beginning, extended versions of selected papers are published as special issues of the International Journal of Foundations of Computer Science, the Journal of Automata, Languages and Combinatorics, of Theoretical Computer Science, and of Information and Computation In 2002 DCFS was the result of the merger of the workshops DCAGRS (Descriptional Complexity of Automata, Grammars and Related Structures) and FDSR (Formal Descriptions and Software Reliability). The workshop is often collocated with international conferences in related fields, such as ICALP, DLT and CIAA.

Topics of the workshop Typical topics include: various measures of descriptional complexity of automata, grammars, languages and of related systems trade-offs between descriptional complexity and mode of operation circuit complexity of Boolean functions and related measures succinctness of description of (finite) objects state complexity of finite automata descriptional complexity in resource-bounded or structure-bounded environments structural complexity descriptional complexity of formal systems for applications (e.g. software reliability, software and hardware testing, modelling of natural languages) descriptional complexity aspects of nature-motivated (bio-inspired) architectures and unconventional models of computing Kolmogorov–Chaitin complexity and descriptional complexity As such, the topics of the conference overlap with those of the International Federation for Information Processing Working Group 1.2 on descriptional complexity.

Significance In a survey on descriptional complexity, state that "since more than a decade the Workshop on 'Descriptional Complexity of Formal Systems' (DCFS), [...] has contributed substantially to the development of [its] field of research." In a talk on the occasion of the 10th anniversary of the workshop, gave an overview about trends and directions in research papers presented at DCFS.

History of the workshop

Chairs of the Steering Committee of the DCFS workshop series:

Period Chair 1999 - 2005 Detlef Wotschke 2006 - 2017 Giovanni Pighizzini 2017 - Martin Kutrib

Basic information on each DCFS event, as well as on its precursors, DCAGRS and FSDR, is included in the following table.

Event Location PC chairs Proceedings Special issue 1st DCAGRS 1999 Magdeburg, Germany Jürgen Dassow Detlef Wotschke Journal of Automata, Languages and Combinatorics 5(3), 2000 2nd DCAGRS 2000 London, Ontario, Canada Helmut Jürgensen Journal of Automata, Languages and Combinatorics 6(4), 2001 3rd DCAGRS 2001 Vienna, Austria Jürgen Dassow Detlef Wotschke Journal of Automata, Languages and Combinatorics 7(4), 2002 1st FSDR 1998 Paderborn, Germany 2nd FSDR 1999 Boca Raton, Florida, USA 3rd FSDR 2000 San Jose, California, USA 4th DCFS 2002 London, Ontario, Canada Jürgen Dassow Helmut Jürgensen Detlef Wotschke Journal of Automata, Languages and Combinatorics 9(2/3), 2004 5th DCFS 2003 Budapest, Hungary Erzsébet Csuhaj-Varjú Chandra Kintala Detlef Wotschke Theoretical Computer Science 330(2), 2005 6th DCFS 2004 London, Ontario, Canada Lucian Ilie Detlef Wotschke International Journal of Foundations of Computer Science 16(5), 2005 7th DCFS 2005 Como, Italy Giovanni Pighizzini Detlef Wotschke Journal of Automata, Languages and Combinatorics 12(1/2), 2007 8th DCFS 2006 Las Cruces, New Mexico, USA Hing Leung Giovanni Pighizzini Theoretical Computer Science 387(2), 2007 9th DCFS 2007 High Tatras, Slovakia Viliam Geffert Giovanni Pighizzini International Journal of Foundations of Computer Science 19(4), 2008 10th DCFS 2008 Charlottetown, Canada Cezar Câmpeanu Giovanni Pighizzini Theoretical Computer Science 410(35), 2009. 11th DCFS 2009 Magdeburg, Germany Jürgen Dassow Giovanni Pighizzini EPTCS 3 Journal of Automata, Languages and Combinatorics, 15(1-2), 2010 12th DCFS 2010 Saskatoon, Saskatchewan, Canada Ian McQuillan Giovanni Pighizzini EPTCS 31 International Journal of Foundations of Computer Science, 23(1), 2012 13th DCFS 2011 Giessen, Germany Markus Holzer Martin Kutrib Giovanni Pighizzini LNCS 6808 Theoretical Computer Science, 449, 2012 14th DCFS 2012 Braga, Portugal Martin Kutrib Nelma Moreira Rogério Reis LNCS 7386 Journal of Automata, Languages and Combinatorics, 17(2-4), 2012 15th DCFS 2013 London, Ontario, Canada Helmut Jürgensen Rogério Reis LNCS 8031 International Journal of Foundations of Computer Science, 25(7), 2014 16th DCFS 2014 Turku, Finland Helmut Jürgensen Juhani Karhumäki Alexander Okhotin LNCS 8614 Theoretical Computer Science, 610, 2016 17th DCFS 2015 Waterloo, Ontario, Canada Alexander Okhotin Jeffrey O. Shallit LNCS 9118 Information and Computation, 259(2), 2018 18th DCFS 2016 Bucharest, Romania Cezar Câmpeanu Jeffrey O. Shallit LNCS 9777 Journal of Automata, Languages and Combinatorics, 22(1-3), 2017 19th DCFS 2017 Milan, Italy Cezar Câmpeanu Giovanni Pighizzini LNCS 10316 International Journal of Foundations of Computer Science, 30(6-7), 2019 20th DCFS 2018 Halifax, NS, Canada Stavros Konstantinidis Giovanni Pighizzini LNCS 10952 Theoretical Computer Science, 798, 2019 21st DCFS 2019 Košice, Slovakia Galina Jirásková Stavros Konstantinidis LNCS 11612 Information and Computation, to appear 22nd DCFS 2020 Vienna, Austria (cancelled) Galina Jirásková Giovanni Pighizzini LNCS 12442 (collected papers) Journal of Automata, Languages and Combinatorics, in progress

See also The list of computer science conferences contains other academic conferences in computer science.

References Bianca Truthe: "Report on DCFS 2008." Bulletin of the EATCS 96:160-161, October 2008. Online edition accessed Feb 9, 2009. Talk held at the 11th DCFS in Magdeburg, Germany, July 6–9, 2009. Ian McQuillan: "Report on DCFS 2009." Bulletin of the EATCS 99:185-187, October 2009. Online edition accessed Nov 24, 2009. Electronic Proceedings in Theoretical Computer Science, official website.

Andreas Malcher: "Report on DCFS 2012." Bulletin of the EATCS 108:168-169, October 2012. Online edition.

External links Descriptional Complexity of Formal Systems: official website