Andreas Fjellstad's research is on logic with focus on logical paradoxes and logical validity from a proof-theoretic perspective with a FRIPRO mobility grant from The Research Council of Norway for the project Expressing Validity by Revision: Formal and Philosophical Aspects.
In connection with this prosject, Fjellstad is a visiting researcher at the University of Helsinki in the period 2017-2019.
Peer-reviewed journal articles
Fjellstad, A. (2017). Non-Classical Elegance for Sequent Calculus Enthusiasts. Studia Logica 105(1):93-119.
Fjellstad, A. (2016). Omega-Inconsistency Without Cuts and Nonstandard Models. Australasian Journal of Logic 13(5).
Fjellstad, A. (2016). Naïve modus ponens and failure of transitivity. Journal of Philosophical Logic 45(1):65-72.
Fjellstad, A. (2015). How a Semantics for Tonk Should Be. The Review of Symbolic Logic 8(3):488-505.
Fjellstad, A. (2011). Har katter mistet kjærligheten til visdom? Filosofisk Supplement: 04/2011