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The Frankl's conjecture, formulated in 1979. and still open, states that in every family of sets closed for unions there is an element contained in at least half of the sets. FC-families are families for which it is proved that every union-closed family containing them satisfies the Frankl's condition (e.g., in every union-closed family that contains a… (More)

Let V n be the number of equivalence classes of invertible maps from {0, 1} n to {0, 1} n , under action of permutation of variables on domain and range. So far, the values V n have been known for n 6. This paper describes the procedure by which the values of V n are calculated for n 30.

Wireless sensor networks (WSN) are formed by hundreds and thousands of small sensors, communicating between themselves by means of wireless communication. Due to large scale of these networks and expensive deployment, simulation is the method of choice in many projects that study and analyze the performance of a sensor network. A great number of simulators… (More)

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