Artículos con la etiqueta ‘El concepto de tiempo’

Present time

Por • 21 mar, 2014 • Category: Educacion

The idea of a moving present or `now’ seems to form part of our most basic beliefs about reality. Such a present, however, is not reflected in any of our theories of the physical world. I show in this article that presentism, the doctrine that only what is present exists, is in conflict with modern relativistic cosmology and recent advances in neurosciences. I argue for a tenseless view of time, where what we call `the present’ is just an emergent secondary quality arising from the interaction of perceiving self-conscious individuals with their environment. I maintain that there is no flow of time, but just an ordered system of events.



El Tiempo de la energía en Aristóteles

Por • 29 jul, 2013 • Category: Filosofía

Al comienzo del libro cuarto de la Metafísica Aristóteles dice que la filosofía primera es la ciencia que investiga el ente como ente y lo que le corresponde en sí mismo. Esta trata del ente en cuanto ente en general, o bien con respecto al todo. Su generalidad radica en que el ente en sí mismo es primero en el sentido del origen del ser concerniente a todo ente. Aristóteles no responde a la pregunta por el ente primero objeto de dicha ciencia, de una única manera, sino múltiplemente, pues él se dice según el accidente, lo verdadero y lo falso, las figuras de la predicación y por último, según la dinamis y la energía. La dinamis y la energía pertenecen a la pregunta por el ente en cuanto ente.



Three Merry Roads to T-Violation

Por • 30 jun, 2013 • Category: Leyes

This paper is a tour of how the laws of nature can distinguish between the past and the future, or be T-violating. I argue that, in terms of the basic argumentative structure, there are really just three approaches currently being explored. I show how each is characterized by a symmetry principle, which provides a template for detecting T-violating laws even without knowing the laws of physics themselves. Each approach is illustrated with an example, and the prospects of each are considered in extensions of particle physics beyond the standard model.



Cosmology and Time

Por • 17 abr, 2013 • Category: Filosofía

Time has always played a crucial role in cosmology. I review some of the aspects of the present cosmological model which are more directly related to time, such as: the definition of a cosmic time; the existence of typical timescales and epochs in an expanding universe; the problem of the initial singularity and the origin of time; the cosmological arrow of time.



Time of Philosophers, Time of Physicists, Time of Mathematicians

Por • 26 abr, 2011 • Category: Filosofía

Is presentism compatible with relativity ? This question has been much debated since the argument first proposed by Rietdijk and Putnam. The goal of this text is to study the implications of relativity and quantum mechanics on presentism, possibilism, and eternalism. We put the emphasis on the implicit metaphysical preconceptions underlying each of these different approaches to the question of time. We show that there exists a unique version of presentism which is both non-trivial, in the sense that it does not reduce the present to a unique event, and compatible with special relativity and quantum mechanics: the one in which the present of an observer at a point is identified with the backward light cone of that point. However, this compatibility is achieved at the cost of a renouncement to the notion of an objective, observer-independent reality. We also argue that no non-trivial version of presentism survives in general relativity, except if some mechanism forbids the existence of closed timelike curves, in which case precisely one version of possibilism does survive.