We solve some decision problems for timed automata which were raised by S. Tripakis in [Tri04] and by E. Asarin in [Asa04]. In particular, we show that one cannot decide whether a ...
Polygonal hybrid systems (SPDI) are a subclass of planar hybrid automata which can be represented by piecewise constant differential inclusions. The reachability problem as well as...
Use Cases are a wide-spread informal method for specifying the requirements of a technical system in the early development phase. Z is a formal notation which aims to support, bes...
Abstract. The paper presents several analyses to detect non-deterministic expressions in the parallel-functional language Eden. First, the need for the analysis is motivated, and t...
Sac is a functional array processing language particularly designed with numerical applications in mind. In this field the runtime performance of programs critically depends on the...