We study the complexity of several standard problems for 1-safe Petri nets and some of its subclasses. We prove that reachability, liveness, and deadlock are all PSPACE-complete f...
A binary decision diagram (BDD) is a directed acyclic graph for representing a Boolean function. BDD’s are widely used in various areas which require Boolean function manipulatio...
One way to analyse programs is to to derive expressions for their computational behaviour. A time bound function (or worst-case complexity) gives an upper bound for the computatio...
We introduce the notion of associative one-way functions and prove that they exist if and only if P 6= NP. As evidence of their utility, we present two novel protocols that apply ...
Abstract. We will show how padding techniques can be applied on onedimensional cellular automata by proving a transfer theorem on complexity classes (how one inclusion of classes i...