We propose and advocate basic principles for the fusion of incomplete or uncertain information items, that should apply regardless of the formalism adopted for representing pieces of information coming from several sources. This formalism can be based on sets, logic, partial orders, possibility theory, belief functions or imprecise probabilities. We propose a general notion of information item ...

We attempt to describe geometry in terms of informational quantities for the universe considered as a finite ensemble correlated quantum particles. As main dynamical principle, we use conservation sum all kinds entropies: thermodynamic, and informational. The fundamental constant speed is interpreted information velocity world also connected with gravitational potential on particle. two postula...

We recall that the Ramsey Rule can be seen as axiomatising the relationship of inverse accessibility relations which exists between the notions of update and counterfactual conditional. We use this fact to translate between postulates for updates and postulates for counterfactuals. Thus, Katsuno/Mendelzon's postulates U1{U8 are translated into counterfactual postulates C1{C8 (theorem 6), and ma...

In access control frameworks with the possibility of delegating permissions and administrative rights, delegation chains can form. There are different ways to treat these delegation chains when revoking rights, which give rise to different revocation schemes. Hagström et al. [11] proposed a framework for classifying revocation schemes, in which the different revocation schemes are defined graph...

Starting from Katsuno and Mendelzon postulates, a new set of postulates which is minimal and complete has been deened, these postulates characterize an update operator. The update operator class which is obtained is larger than Katsuno and Mendelzon's one, since it includes updating operators which are not inert, and which allow for the existence of unreachable states. The main property is that...