1. Decidability of reachability in vector addition systems (Preliminary Version)
2. A structure to decide reachability in Petri nets
3. Improved Ackermannian lower bound for the VASS reachability problem;lasota;CoRR,2021
4. The reachability problem for Petri nets is not primitive recursive;leroux;Proceedings of FOCS 2021,2021
5. The reachability problem for Petri nets is not primitive recursive;leroux;CoRR,2021