Titlebook: Machines, Computations, and Universality; 5th International Co Jérôme Durand-Lose,Maurice Margenstern Conference proceedings 2007 Springer-

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A Survey of Infinite Time Turing Machinesinitary computability, with robust notions of computability and decidability on the reals, while remaining close to classical concepts of computability. Here, I survey the theory of infinite time Turing machines and recent developments. These include the rise of infinite time complexity theory, the

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Uniform Solution of QSAT Using Polarizationless Active Membranesanes with non–elementary membrane division. We present a double improvement of this result by showing that the satisfiability of a . Boolean formula (.) can be solved by a . family of P systems of the same kind.

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Satisfiability Parsimoniously Reduces to the TantrixTM Rotation Puzzle Problemoblem becomes undecidable. We study the counting version and the unique version of this problem. We prove that the satisfiability problem parsimoniously reduces to the Tantrix. rotation puzzle problem. In particular, this reduction preserves the uniqueness of the solution, which implies that the uni

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On the Power of Networks of Evolutionary Processorsoid) every recursively enumerable language can be generated by a network with one deletion and two insertion nodes. Networks with an arbitrary number of deletion and substitution nodes only produce finite languages, and for each finite language one deletion node or one substitution node is sufficien

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More on the Size of Higman-Haines Sets: Effective Constructionsat these sets . be effectively computed in general. Here the Higman-Haines sets are the languages of all scattered subwords of a given language and the sets of all words that contain some word of a given language as a scattered subword. Recently, the exact level of unsolvability of Higman-Haines set

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