Este trabajo realiza un estudio metafísico sobre la noción de contacto en términos de límites a partir de una ontología de objetos materiales. Dos cosas están en contacto cuando sus límites (o partes de ellos) se topan espacialmente. Las tesis relacionista y la substantivista sobre la naturaleza del espacio son evaluadas en sus compromisos respecto a la idea de contacto. Sin embargo, puesto que considerando algunos descubrimientos de la física cuántica es posible descartar la idea de contacto físico, la discusión (...) requiere ser trasladada a un espacio topológicamente continuo. Aquí la idea de contacto requiere solucionar la compatibilidad entre la existencia de un espacio continuo y la existencia de límites como un tipo de discontinuidad. Cuatro tesis son evaluadas: clásica, superposición, brecha, y coincidencia. Esta última es defendida puesto que, a diferencia de las otras, no renuncia a características ontológicas fundamentales de un límite y es la menos arbitraria sobre su pertenencia. (shrink)

A collection of papers presented at the First International Summer Institute in Cognitive Science, University at Buffalo, July 1994, including the following papers: ** Topological Foundations of Cognitive Science, Barry Smith ** The Bounds of Axiomatisation, Graham White ** Rethinking Boundaries, Wojciech Zelaniec ** Sheaf Mereology and Space Cognition, Jean Petitot ** A Mereotopological Definition of 'Point', Carola Eschenbach ** Discreteness, Finiteness, and the Structure of Topological Spaces, Christopher Habel ** Mass Reference and the Geometry of Solids, Almerindo E. Ojeda (...) ** Defining a 'Doughnut' Made Difficult, N .M. Gotts ** A Theory of Spatial Regions with Indeterminate Boundaries, A.G. Cohn and N.M. Gotts ** Mereotopological Construction of Time from Events, Fabio Pianesi and Achille C. Varzi ** Computational Mereology: A Study of Part-of Relations for Multi-media Indexing, Wlodek Zadrozny and Michelle Kim. (shrink)

The general hypothesis underlying this work is that mereology (the study of the relations between an entity and its parts) and topology (understood as the study of the qualitative relations of connection and compactness) may jointly constitute adequate grounds for the formal-ontological analysis of the world of ordinary experience. The analysis focuses on certain minimal (structural) principles on the basis of which different philosophical theories may be erected.

An informal theory is set forth of relations between abstract entities, includingcolors, physical quantities, times, andplaces in space, and the concrete things thathave them, or areat orin them, based on the assumption that there are close analogies between these relations and relations between abstractsets and the concrete things that aremembers of them. It is suggested that even standard scientific usage of these abstractions presupposes principles that are analogous to postulates of abstraction, identity, and other fundamental principles of set theory. Also (...) discussed is the significance of important disanalogies between sets and physical abstractions, including especiallymodal andtemporal aspects of physical abstractions, which is related to the problem of the characterizingconstancy, of colors, physical attributes, and locations in space. (shrink)