[en] After an introduction to the elementary notions on potential scattering in quantum theory, the spin of electron, the composition of kinetic momenta, the theory of the stationnary perturbations, the approximation methods in time-dependent problems and the systems of identical particles are presented

[en] Arguments are given in support of three ideas, which are: (a) that the concept of (independent) reality is a necessary one, (b) that reality is 'remote' and 'nonphysical' (the meaning of these words are defined in the text) and (c) that we should nevertheless feel concerned by it

[en] The difficulties emerging in the building of satisfactory inferential schemes in Quantum Theory are highlighted. In particular, it is shown why the result of such a procedure is necessarily conditioned by the adoption, even implicit, of a microsystem model and hence raises questions of principle of a semeiological order

[en] Published in summary form only

[en] We show that quantum mechanics is not a complete theory. We do not as in the case of Einstein Podolsky and Rosen derive this incompleteness by a logical reasoning ex absurdum, but indicate explicitely which are the missing elements of reality in the description by quantum mechanics of separated physical systems

[en] We describe an experimental situation with which qualitatively different observable predictions are obtained for the usual interpretation of Quantum Mechanics and the theory of double solution. From the results of such an experiment one of these conceptions of microphysics should then be abandoned

No abstract available

[en] The Einstein-Podolski-Rosen 1935 postulates, implying locality, reality and causality, are confronted with J.S. Bells 1964 theorem on theories with hidden parameters. A modern formulation of the Copenhagen interpretation of quantum mechanics is presented and the transition to classical mechanics considered. (Quittner)

No abstract available

[en] The main object of the study of the present paper is the pair (L, P) consisting of two nonempty sets: the logic L of experimentally verifiable propositions (also called questions, events, yes-no measurements) and the set P of pure states, and satisfying several physically plausible postulates formulated recently (here, the postulates (A1), (A3) and (PP)). (L, P), endowed with the axioms mentioned above, was recently shown to give a proper non-lattice frame replacing the well-known quantum logic axiomatic scheme. In the present paper we consider in detail two important concepts, the projection postulate and the superposition principle, both within the non-lattice framework of the pair (L, P)