The satisfiability problems for CTL and CTL are known to be EXPTIME-complete, resp. 2EXPTIMEcomplete (Fischer and Ladner (1979), Vardi and Stockmeyer (1985)). For fragments that u...
Arne Meier, Martin Mundhenk, Michael Thomas, Herib...
The main problem arising from the use of complex constraints in Computational Linguists is due to the NP-hardness of checking whether a given set of constraints is satisfiable and...
The satisfiability problem of hybrid logics with the downarrow binder is known to be undecidable. This initiated a research program on decidable and tractable fragments. In this p...
Arne Meier, Martin Mundhenk, Thomas Schneider 0002...
In a seminal paper from 1985, Sistla and Clarke showed that satisfiability for Linear Temporal Logic (LTL) is either NP-complete or PSPACE-complete, depending on the set of tempora...
Michael Bauland, Thomas Schneider 0002, Henning Sc...
The study of random instances of NP complete and coNP complete problems has had much impact on our understanding of the nature of hard problems. In this work, we initiate an effor...