The International Symposium on Parameterized and Exact Computation (IPEC, formerly IWPEC) is a strongly peer-reviewed annual conference that covers research in all aspects of parameterized and exact algorithms and complexity.


The first International Workshop on Exact and Parameterized Computation (IWPEC) took place in Bergen in 2004. Since 2008, IWPEC has been held annually. In 2010, IWPEC changed its name to International Symposium on Parameterized and Exact Computation (IPEC). Since 2011, IPEC has often been co-located with the European Symposium on Algorithms (ESA) and other conference and workshops in the ALGO confederated conference, held in Europe in early September. The research contributions accepted for presentation at the conference appear in printed proceedings; the 2004–2014 conferences were published with Springer in the Lecture Notes in Computer Science series. Since 2015, the IPEC proceedings are published in the Leibniz International Proceedings in Informatics.

Steering Committee

Organization of the steering committee
• for three years, rotates in September after IPEC
• the two PC chairs of IPEC x+1 join SC after IPEC x
• one additional member is elected by SC each year
• thus SC consists of nine members

How to join:
•Express interest in being an IPEC PC chair or SC member
• ultimately the SC decides by nomination plus vote
• soft tradition of being PC chair only once, so afterwards can only join the SC through vote

Upcoming events

Previous events

16th IPEC (2021)
virtual event, together with ALGO, September 8-10, 2021, website Publicity Report
15th IPEC (2020)
virtual event, Hong Kong, together with ISAAC 2020, December 14–18, 2020, IPEC 2020 website Business Meeting
14th IPEC (2019)
Arranged at ALGO 2019, Munich, Germany, September 11–13, 2019. call for papers. IPEC 2019 website Business Meeting and Publicity Report
13th IPEC (2018)
Helsinki, Finland, August 20–24, 2018. IPEC 2018 website Business Meeting Report PC Report
12th IPEC (2017)
Vienna, Austria, September 4–8, 2017. IPEC 2017 website Business Meeting Report. PC Report. Publicity Report.
11th IPEC (2016)
Aarhus, Denmark, August 24–26, 2016. IPEC 2016 website
10th IPEC (2015)
Patras, Greece, September 16-18, 2015. proceedings contents IPEC 2015 website
9th IPEC (2014)
Wroclaw, Poland, September 10-12, 2014. proceedings contents IPEC 2014 website
8th IPEC (2013)
Sophia Antipolis, France, September 4-6, 2013. proceedings contents IPEC 2013 website
7th IPEC (2012)
Ljubljana, Slovenia, September 12-14, 2012. proceedings contents IPEC 2012 website
6th IPEC (2011)
Saarbrücken, Germany, September 6-8, 2011. proceedings contents IPEC 2011 website
5th IPEC (2010)
Chennai, India, December 13-15, 2010. proceedings contents IPEC 2010 website
4th IWPEC (2009)
Copenhagen, Denmark, September 10-11, 2009. proceedings contents IWPEC 2009 website
3rd IWPEC (2008)
Victoria, Canada, May 14-16, 2008. proceedings contents IWPEC 2008 website (no longer available)
2nd IWPEC (2006)
Zürich, Switzerland, September 13-15, 2006. proceedings contents IWPEC 2006 website
1st IWPEC (2004)
Bergen, Norway, September 14-17, 2004. proceedings contents IWPEC 2004 website


Best paper award and Best student paper award 2020
Łukasz Bożyk, Jan Derbisz, Tomasz Krawczyk, Jana Novotná and Karolina Okrasa, "Vertex Deletion into Bipartite Permutation Graphs", and Tuukka Korhonen "Finding Optimal Triangulations Parameterized by Edge Clique Cover."
Best student paper 2019
Gregory Rosenthal, "Beating Treewidth for Average-Case Subgraph Isomorphism."
Best paper award 2019
Giordano Da Lozzo, David Eppstein, Michael Goodrich and Siddharth Gupta, "C-Planarity Testing of Embedded Clustered Graphs with Bounded Dual Carving-Width."
Best paper and best student paper award 2018
Marc Roth and Johannes Schmitt, "Counting Induced Subgraphs: A Topological Approach to #W[1]-hardness."
Excellent student paper 2017
Bart M. P. Jansen, Astrid Pieterse, "Optimal Data Reduction for Graph Coloring Using Low-Degree Polynomials."
Best paper award 2017
Radu Curticapean, Holger Dell, Fedor V. Fomin, Leslie Ann Goldberg, John Lapinskas, "A Fixed-Parameter Perspective on #BIS."
Best paper award 2016
Kitty Meeks, “Randomised enumeration of small witnesses using a decision oracle,” Archontia Giannopoulou, Michał Pilipczuk Jean-Florent Raymond, Dimitrios Thilikos and Marcin Wrochna, “Cutwidth: obstructions and algorithmic aspects,” and Cornelius Brand, Holger Dell and Marc Roth, “Fine-grained dichotomies for the Tutte plane and Boolean #CSP.”
Excellent student papers 2016
Michal Wlodarczyk, “Clifford algebras meet tree decompositions,” R. Krithika, Abhishek Sahu and Prafullkumar Tale, “Dynamic Parameterized Problems.”
Excellent student papers 2015
Stefan Kratsch and Manuel Sorge, “On Kernelization and Approximation for the Vector Connectivity Problem.”
Excellent student papers 2013
Bart M.P. Jansen “On Sparsification for Treewidth Computations,” Lukas Mach and Tomas Toufar “Amalgam Width of Matroids,” and Mateus de Oliveira Oliveira “Subgraphs Satisfying MSO Properties on z-Topologically Orderable Digraphs.”
Excellent student paper 2012
Ivan Bliznets and Alexander Golovnev, “A New Algorithm for Parameterized MAX-SAT.”
Excellent student paper 2011
Yoichi Iwata, “A Faster Algorithm for Dominating Set Analyzed by the Potential Method.”
Excellent student papers 2010
Jesper Nederlof and Johan M. M. van Rooij, “Inclusion/Exclusion Branching for Partial Dominating Set Set Splitting,” and M. Praveen, “Small Vertex Cover Makes Petri Net Coverability and Boundedness Easier."

Steering Committee

Current Members
The IPEC Steering Committee after IPEC 2018 has the following members:

  • Yixin Cao (2019 - 2022)
  • Bart M. P. Jansen (2018 - 2021)
  • Eun Jung Kim (2019 - 2022)
  • Daniel Marx (2020 - 2023)
  • Marcin Pilipczuk (2019 - 2022)
  • Meirav Zehavi (2020 - 2023)
  • Saket Saurabh (2018 - 2021, chair 2020-2021)
  • Jan Arne Telle (2018 - 2021)
  • Petr Golovach (2020 - 2023)

Publicity Chair

  • Frances Rosamond

Former Members

  • Christophe Paul (2017 - 2020)
  • Magnus Wahlström (2017 - 2020, chair 2019-2020)
  • Michał Pilipczuk (2017 - 2020)
  • Henning Fernau (2015–2019) (chair 2018)
  • Daniel Lokshtanov (2016–2019)
  • Naomi Nishimura (2016–2019)
  • Hans Bodlaender 2012-2015 (chair 2015)
  • Jianer Chen 2009-2012
  • Marek Cygan 2013–2016
  • Frank Dehne
  • Rod Downey
  • Mike Fellows 2009-2012
  • Fedor Fomin, 2009-2012 (chair 2012)
  • Martin Grohe
  • Jiong Guo (2015–2018)
  • Gregory Gutin 2011-2014
  • Pinar Heggernes 2013–2016 (chair 2015–2016)
  • Danny Hermelin (2015–2018)
  • Thore Husfeldt (2012–2017)
  • Iyad Kanj (2014–2017)
  • Stefan Kratsch (2015–2018, chair 2016-2018).
  • Michael Langston
  • Daniel Marx 2010-2013
  • Rolf Niedermeier 2012–2015
  • Venkatesh Raman
  • Peter Rossmanith 2010-2013
  • Saket Saurabh 2009-2012
  • Stefan Szeider 2011–2014
  • Dimitrios Thilikos 2011–2014
  • Gerhard Woeginger (2011–2017)


IPEC proceedings in the DBLP database

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