It is generally believed that the de Broglie-Bohm model does not admit a particle interpretation for massive relativistic spin-0 particles, on the basis that particle trajectories cannot be defined. We show this situation is due to the fact that in the standard representation of the Klein-Gordon equation the wavefunction systematically contains superpositions of particle and anti-particle contributions. We argue that by working in a Foldy-Wouthuysen type representation uncoupling the particle from the anti-particle evolutions, a positive conserved density for a particle (...) and associated density current can be defined. For the free Klein-Gordon equation the velocity field obtained from this current density appears to be well-behaved and sub-luminal in typical instances. As an illustration, Bohmian trajectories for a spin-0 boson distribution are computed numerically for free propagation in situations in which the standard velocity field would take arbitrarily high positive and negative values. (shrink)

Of the many problems of history and culture, the problem of correct understanding and interpretation of universal symbols, as well as their wise use, is very relevant. Since the subject of the study is not individual symbols, and not even symbolic systems, but the outlook component of the transformation of symbols, in the field of research is the interaction of culture and its creator - a person whose change of position leads to a change in the interpretation of symbols, and (...) therefore changes in the symbolism. The main task of the article is to understand the phenomenon of the symbol and its transformation in a single structure of history and culture. (shrink)

The usual definition of (non-contextual) hidden variables is found to be too restrictive, in the sense that, according to it, even some classical systems do not admit hidden variables. A more general concept is introduced and the term “approximate hidden variables” is used for it. This new concept avoids the aforementioned problems, since all classical systems admit approximate hidden variables. Standard quantum systems do not admit approximate hidden variables, unless the corresponding Hilbert space is 2-dimensional. However, an appropriate non-standard quantum (...) system, which arises by focussing on momentum and position and neglecting the remaining observables, admits approximate hidden variables. Systems associated with JBW-algebras (resp. von Neumann algebras) and satisfying some mild conditions admit approximate hidden variables iff they are classical, that is, iff the corresponding JBW-algebra (resp. von Neumann algebra) is associative (resp. commutative). (shrink)

IntroductionEddy M. Zemach was born in Jerusalem in 1935. His mother, Helena, was a dentist as well as a poet, and his father, Shimon, was a dentist as well as a political figure. Eddy completed B.A. and M.A. degrees in both Hebrew literature and philosophy at the Hebrew university of Jerusalem. He studied for a doctoral degree in philosophy at Yale University. In 1965 he completed his dissertation on the boundaries of the aesthetic, supervised by Paul Weiss. Another of his (...) teachers at Yale was Wilfrid Sellars, who influenced his philosophical views on mind and language. Aesthetics, philosophy of mind, and philosophy of language formed the center of his philosophical interest, though this interest was extended to other philosophical areas, such as metaphysics and epistemology.Eddy published extensively in both philosophy and Hebrew literature, and also wrote many short stories . He wrote some two hundred papers, and twelve scholarly books .. (shrink)

Kungmin yulli t'ŭkkang -- Ch'oe Che-u non -- Silla munhwa wa p'ungnyu chŏngsin.

v. 1. Philosophy, theology and mysticism in medieval Islam -- v. 2. Early Islamic theology : the Muʻtazilites and al-Ashʻarī -- v. 3. Classical Islamic theology : the Ashʻarites.

(No abstract is available for this citation).