All systems in science, industry and business are built on **algorithms**. The
center is devoted to the algorithmic challenges in the design and analysis of modern
*complex systems* and to the underlying theories of computational complexity. We
aim at competitive * algorithmic solutions* that exploit novel concepts,
structures and approaches in any context.

The *Chair for Algorithms and Complexity* is led by professor Hans L. Bodlaender and is part of
the division *`Algorithms'* of the Department of Information and
Computing Sciences at Utrecht University. The research is part of the programme of the
Utrecht Research Institute of Information and
Computing Sciences.

**Computational complexity**e.g. fixed parameter tractability, exact algorithms, kernelization, hardness, fine-grained complexity.**Graph- and network algorithms**e.g. graph classes, structural analysis, treewidth, parameterized algorithms, network modeling.**Optimization and simulation**e.g. linear programming, column generation, heuristics, planning, scheduling, robustness.**Applied algorithmics**e.g. in computational sustainability, public transport, and network science.

- Center for Complex Systems Studies: CCSS
- Complexity Lab Utrecht: CLUe.

- Conferences, symposia, workshops: discrete algorithms, complexity, design, experimentation.
- Interest Groups
- Programmes: Networks
- Weblogs: Computational complexity (Fortnow & Gasarch), Theory of computation (Lipton & Regan), In theory (Trevisan).
- Research in Europe:

- Reflections: The algorithm: idiom of modern science (Chazelle), Complexity and algorithms (Diaz).
- Compendia: complexity zoo (Aaronson), NP-optimization problems (Creszenzi and Kann), parameterized complexity problems (Cesati).
- Game theory: game theory net.
- Graph classes and their inclusions: ISGCI (De Ridder et al).
- Lists: integer sequences (Sloane), random numbers (Haahr), algorithms (Wikipedia), sorting algorithm animations (Martin).
- Seminars: Computational sustainability (2013).
- Some old papers:
- A
partial
*k*-arboretum of graphs with bounded treewidth (Bodlaender, 1998)

- A
partial
- The most important: algorithms (Kouchan), programmers (Wikipedia), software innovations (Wheeler).
- Other Pages: The P-versus-NP page (Woeginger), Theory Matters (SIGACT).

- Journals/Proceedings:
- ACM digital lib (ACM), ACM guide (ACM), Electronic Colloquium on Computational Complexity (ECC), IEEE digital lib (IEEE), Lecture Notes in Computer Science (LNCS, see also here), Electronic Notes in TCS (vol 1 -) , Science Direct (Elsevier).

- Collections/Repositories:
- e-Print archive (arXiv), computer science (e-prints), computer science bibliographies, CoRR (Computing Research Repository), DBLP (Trier), OpenAIRE (Open Access), ResearchIndex (CiteSeerx).

- Search engines:

The term `Algorithmic Systems' was used for the first time in
the First ACM Turing Award Lecture, by Alan J. Perlis in 1966: *The
Synthesis of Algorithmic Systems*, see J.ACM 14 (1967) 1-9.

*Last changed: February 2018.*