3 papers
math.LO2026
Classification and deontic explosion for contrary-to-duty obligations
Bjørn Kjos-Hanssen
Carmo and Jones have presented a sequence of candidate axiom systems for conditional obligation between 1997 and 2022. For their most recent system we demonstrate a limited form of…
cs.DM2026
Unbounded length minimal synchronizing words for quantum channels over qutrits
Bjørn Kjos-Hanssen, Swarnalakshmi Lakshmanan
Grudka, Karczewski, Kurzynski, Stempin, Wójcik and Wojcik (2025) constructed quantum channels with synchronizing words of length 3 for qutrits. We extend their result to arbitraril…
math.CO2025
Concatenative nonmonotonicity and optimal links in HP protein folding models
Bjørn Kjos-Hanssen
The hydrophobic-polar (HP) model represents proteins as binary strings embedded in lattices, with fold quality measured by an energy score. We prove that the optimal fold energy is…