I am an assistant professor and member of the Programming, Logic and Intelligent Systems research group in the Department of People and Technology at Roskilde University, Denmark.
Previously, I was a postdoctoral researcher at the School of Computing Science at Simon Fraser University in Burnaby, BC, Canada (2019-2021), and at the Knowledge-Based Systems Group at RWTH Aachen University, Germany (2013-2019), where I also acquired my PhD (2013).
My research is in Knowledge Representation and Reasoning, a subarea of Artificial Intelligence that studies how an agent's knowledge can be represented symbolically and subsequently manipulated through reasoning algorithms. Among other things, my work is concerned with reasoning about action and change, reasoning about beliefs, planning, agent program verification, and machine ethics.
The ß in my last name is a German letter that is roughly pronounced like "ss" (as in pass), and not to be confused with a "b" or the Greek letter beta (β). An alternative spelling is "Classen".
2024-07-25
I am excited to attend IJCAI 2024 in Jeju, South Korea next week, where I will present the paper I co-authored with Daxin Liu on first-order progression of non-local-effect action theories.
2024-03-13
Next week, I will participate in the Dagstuhl Seminar on Trustworthy AI.
2022-09-23
Next week I will attend the Dagstuhl seminar on Cognitive Robotics: [Link]
Daxin Liu and Jens Claßen:
First-Order Progression beyond Local-Effect and Normal Actions.
In Proceedings of the 33rd International Joint Conference on Artificial Intelligence (IJCAI 2024),
pages 3475-3483, ijcai.org, 2024.
PDFBibTeXDOI
Jens Claßen and James P. Delgrande:
Projection of Belief in the Presence of Nondeterministic Actions and Fallible Sensing.
In Proceedings of the 19th International Conference on Principles of Knowledge Representation and Reasoning (KR 2022),
pages 400-404, ijcai.org, 2022.
PDFBibTeXDOI
Jens Claßen and James P. Delgrande:
Towards a Temporal Account of Contrary-to-Duty Constraints over Complex Actions in the Situation Calculus.
In Proceedings of the 19th International Workshop on Nonmonotonic Reasoning (NMR 2021),
pages 81-90, 2021.
PDFBibTeX