Frej Knutar Lewander
PhD student at Department of Information Technology; Division of Computing Science
- Telephone:
- +46 18 471 54 05
- E-mail:
- frej.knutar.lewander@it.uu.se
- Visiting address:
- Hus 10, Regementsvägen 10
- Postal address:
- Box 337
751 05 UPPSALA
Short presentation
I am doing my PhD in the Optimisation Group and am researching constrained optimisation problems (e.g., route planning and scheduling), constraint satisfaction problems (such as rostering), and the modelling and solving of these problems. My research currently focuses on (constraint-based) local search. You can find my researcher homepage here.
Keywords
- artificial intelligence
- constraint programming
- stochastic local search
- problem modelling
- problem solvers
- combinatorial optimisation
- discrete optimisation

Publications
Recent publications
Dependency-Curated Large Neighbourhood Search
Part of Principles and Practice of Constraint Programming / [ed] Maria Garcia de la Banda, Germany: Schloss Dagstuhl, 2025, Vol. 340, p. 20:1–20:17, 2025
Invariant Graph Propagation in Constraint-Based Local Search
Part of The journal of artificial intelligence research, 2025
- DOI for Invariant Graph Propagation in Constraint-Based Local Search
- Download full text (pdf) of Invariant Graph Propagation in Constraint-Based Local Search
All publications
Articles in journal
Invariant Graph Propagation in Constraint-Based Local Search
Part of The journal of artificial intelligence research, 2025
- DOI for Invariant Graph Propagation in Constraint-Based Local Search
- Download full text (pdf) of Invariant Graph Propagation in Constraint-Based Local Search
Conference papers
Dependency-Curated Large Neighbourhood Search
Part of Principles and Practice of Constraint Programming / [ed] Maria Garcia de la Banda, Germany: Schloss Dagstuhl, 2025, Vol. 340, p. 20:1–20:17, 2025