Ontic Commitment and the Empty Universe

1965 ◽  
Vol 62 (14) ◽  
pp. 359
Author(s):  
Chung-Ying Cheng ◽  
Michael David Resnik
Keyword(s):  
Author(s):  
Alistair Graeme Fox

This essay explores how Ben Okri’s most recent novel, In Arcadia(2002), attempts to reconstruct the possibility of utopia in the face of a fragmentation of identity and destruction of determinate certainties affecting contemporary society in the aftermath of postmodernism. By tracing the intertextual relations existing between this work and earlier works in an intellectual/literary tradition that extends from Theocritus and Virgil through Dante, More, Milton, Sannazzaro, Sidney and others, Fox shows how Okri develops the proposition that men and women confronting an ‘empty universe where the mind spins in uncertainty and repressed terror’ can recover sanity through art. Even though, in Okri’s vision, the world may be ‘a labyrinth without an exit’, presided over by Death without any hint of transcendence, men and women, he concludes, can recover paradise through the ‘painting of the mind’ which can creative complete forms that can be fed into ‘spirit’s factory for the production of reality’. This generative activity, which is at the heart of the Arcadian vision, in Okri’s view, has the power to make life a place of ‘secular miracles’, despite the limitations imposed upon it by the realities of finitude and death. The essay concludes by suggesting that Okri’s concept of utopia is very close to Kant’s idea of Aufklärung as expounded by Michel Foucault –– that is, neither a world era, nor an event whose signs are perceived, nor the dawning of an accomplishment, but rather a process of which men and women are at once elements and agents, and which occurs to the extent that they decide to be its voluntary actors. While in some respects Okri’s vision is strikingly similar to certain of its antecedents, it is thus nevertheless distinctively postmodern in the ways in which it is inflected.


Hoyle & Narlikar (1964 d ) have developed a new theory of gravitation, for which they claim that it is a direct interparticle action theory, that it ‘is equivalent to that of Einstein in the description of macroscopic phenomena, and hence the situation is the same so far as the classical tests of general relativity are concerned’, that the sign of the gravitational constant is correctly determined, and that it has other advantages over Einstein’s theory such as implying the absence of solutions representing an empty universe. In the present paper, it is shown that these claims are largely unsubstantiated.


Mind ◽  
1957 ◽  
Vol LXVI (264) ◽  
pp. 544-546
Author(s):  
H. HOCHBERG
Keyword(s):  

1—In a previous paper the "cosmical" acceleration of a free particle in the presence of the substratum or smoothed-out universe was obtained, and shown to be of the nature of gravitation. In the present paper, the abstract problem of "local" gravitation is considered. The simplest problem of "local" gravitation is the Kepler-Newton problem., which in classical mechanics is the problem of ascertaining the acceleration undergone by a free test-particle in the presence of an isolated point-mass in an otherwise empty universe. Our object is to derive the value of this acceleration by purely kinematic arguments, that is to say, arguments which rely for their empirical premises only on the existence of a temporal experience for each individual observer; as was implicit in the thinking of Zeno, such a temporal experience has to be taken as given before motion can be described at all. However, the concept of the isolated gravitating, mass-particle in an otherwise empty universe is essentially an illegitimate one. In the first place it ignores Mach's principle. We must introduce an array of observers before a relativistic account of gravitation can have a meaning, and these observers must have positions and velocities in order that they may describe the position and velocity of the isolated mass-particle. They must therefore be associated with the presence of particle. They must therefore be associated with the presence of particles other than the massive particle under consideration, and these will play their part in determining the acceleration of a free test particle. In the second place, it has been shown in the previous paper, in general accordance with many modern views, that the phenomenon of gravitation, as summed up in the existence of a "constant" of gravitation, depends itself on the mean matter and motion in the substratum. If we abolish the substratum, as in the classical formulation of the Kepler-Newton problem, we abolish the elements of existence which lead to the isolation of a constant of gravitation. We must therefore retain the substratum.


2003 ◽  
Vol 12 (05) ◽  
pp. 853-860 ◽  
Author(s):  
G. P. SINGH ◽  
S. KOTAMBKAR ◽  
ANIRUDH PRADHAN

In this paper we have revisited the research work of Rahman and Bera22on Kaluza–Klein cosmological model within the framework of Lyra Geometry. It has been shown that the empty universe model yields a power law relation without any assumption. The role of bulk viscosity on five-dimensional cosmological model is discussed. The physical behaviour of the models is examined in all cases.


1955 ◽  
Vol 20 (2) ◽  
pp. 141-149 ◽  
Author(s):  
W. V. Quine

The purpose of this paper is to present and justify a simple proof procedure for quantification theory. The procedure will take the form of a method for proving a quantificational schema to be inconsistent, i.e., satisfiable in no non-empty universe. But it serves equally for proving validity, since we can show a schema valid by showing its negation inconsistent.Method A, as I shall call it, will appear first, followed by a more practical adaptation which I shall call B. The soundness and completeness of A will be established, and the equivalence of A and B. Method A, as will appear, is not new.The reader need be conversant with little more than the fairly conventional use (as in [8]) of such terms as ‘quantificational schema’, ‘interpretation’, ‘valid’, ‘consistent’, ‘prenex’, and my notation (as in [7]) of quasi-quotation.


Author(s):  
Nathalie Deruelle ◽  
Jean-Philippe Uzan

This chapter deals with Einstein equations. In the absence of matter there is no gravitational field, and the spacetime which represents this empty universe is Minkowski spacetime. More precisely, if the gravitational field created by the matter can be neglected, the appropriate framework for describing the matter is that of special relativity. Einstein gravitational equations relate geometry and matter: specifically, they relate the Riemann tensor, or more precisely the Einstein tensor, to the geometrical object describing ‘inertia’, the energy content of the matter—that is, the energy–momentum tensor. These equations form a set of ten nonlinear partial differential equations. The coordinate system can be chosen arbitrarily.


1960 ◽  
Vol 38 (12) ◽  
pp. 1661-1664
Author(s):  
Peter Rastall

An exact, cylindrically symmetric, time-dependent solution of the Einstein gravitational field equations for empty space is derived. A particular case of the solution has singularities only on the axis of symmetry and may represent a number of particles in an otherwise empty universe.


2019 ◽  
pp. 248-256
Author(s):  
G. E. Hughes ◽  
D. G. Londey
Keyword(s):  

2018 ◽  
Vol 27 (14) ◽  
pp. 1847004 ◽  
Author(s):  
Samir D. Mathur

Suppose we assume that in gently curved spacetime (a) causality is not violated to leading order (b) the Birkhoff theorem holds to leading order and (c) CPT invariance holds. Then we argue that the “mostly empty” universe we observe around us cannot be described by an exact wave function [Formula: see text]. Rather, the weakly coupled particles we see are approximate quasiparticles arising as excitations of a “fuzz”. The “fuzz” does have an exact wave function [Formula: see text], but this exact wave function does not directly describe local particles. The argument proceeds by relating the cosmological setting to the black hole information paradox, and then using the small corrections theorem to show the impossibility of an exact wave function describing the visible universe.


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