Titlebook: Infinity in Logic and Computation; International Confer Margaret Archibald,Vasco Brattka,Benedikt Löwe Conference proceedings 2009 Springer

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,Nadia Busi (1968–2007),the University of Siena; her thesis entitled “Petri Nets with Inhibitor and Read Arcs: Semantics, Analysis and Application to Process Calculi” won the annual prize of the Italian Chapter of EATCS for the best Italian PhD thesis..The scientific activity of Nadia was very broad, and covered different

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Symbolic Model Checking of Tense Logics on Rational Kripke Models,dels are based on (generally infinite) ., with vertices labeled by the words in some regular language and transitions recognized by asynchronous two-head finite automata, also known as .. Every atomic proposition in a rational Kripke model is evaluated in a rational set of states. We show that every

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Genetic Systems without Inhibition Rules,regulatory products. The evolution is driven by genetic gates: a new object (representing a protein) is produced when all activator objects are available in the system, and no inhibitor object is present. Activators are not consumed by the application of such a rule. Objects disappear because of deg

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Probabilistic Systems with LimSup and LimInf Objectives,d is assigned to each state, and the value of an infinite path in the MDP is the limsup (resp. liminf) of all rewards along the path. The value of an MDP is the maximal expected value of an infinite path that can be achieved by resolving the decisions of the MDP. Using our result on MDPs, we show th

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,Is , = , for Infinite Time Turing Machines?,onsidered. The question . for Infinite Time Turing Machines, and several variants on it, are treated in, e.g., [6],[2], and [4]..Besides time complexity, we may also try to look at issues of space complexity in ITTMs. However, because an ITTM contains tapes of length ., and all nontrivial ITTM compu

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