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To study systems whose dynamics changes with time, an extension of timed P systems is introduced in which evolution rules may vary with time. The proposed model is a timed automaton with a discrete time domain and in which each state is a timed P system. A result on expressive power and on...
In this paper, we look at the following question. We consider cellular automata in the hyperbolic plane, see (6, 22, 9, 12) and we consider the global function defined on all possible configurations. Is the injectivity of this function undecidable? The problem was answered positively in the case...
We develop clausal tableau calculi for six multimodal logics variously designed for reasoning about multi-degree belief, reasoning about distributed systems of belief and for reasoning about epistemic states of agents in multi-agent systems. Our tableau calculi are sound, complete, cut-free and...
In this paper we generalize the MPMA belief update operator by admitting first-order knowledge bases and restricted first-order update formulae. This allows us to consider scenarios which cannot be properly formalized either in the originalMPMA or in other existing approaches to belief update.
In this paper we consider the problem whether for a map φ : A(B) → B there is a relation R on A(B) such that properties of a map φ: B → B are reflected to R. This is a converse problem that J. Järvinen proved in (5). We give an affirmative answer to the problem. Moreover we give equational...
This paper is devoted to the study of approximate algorithms for minimization of the total weight of attributes occurring in partial association rules. We consider mainly greedy algorithms with weights for construction of rules. The paper contains bounds on precision of these algorithms and...
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