Results 101 to 110 of about 99,723 (258)
Deflection angle in the strong deflection limit in a general asymptotically flat, static, spherically symmetric spacetime [PDF]
, 2016 Gravitational lensing by the light sphere of compact objects like black holes and wormholes will give us information on the compact objects. In this paper, we provide an improved strong deflection limit analysis in a general asymptotically flat, static ...
N. Tsukamoto
semanticscholar +1 more source
Temporal Passage in a Fragmented World
Analytic Philosophy, EarlyView.ABSTRACT Fragmentalism is a relatively recent and striking addition to the debate between tensed and tenseless theories of time. First introduced by Fine in “Tense and Reality,” it presents a rare instance of both a theoretically intriguing and novel theory of time.
Kyley Ewing
wiley +1 more source
Classification of non-Riemannian doubled-yet-gauged spacetime
, 2017 Assuming $$\mathbf {O}(D,D)$$O(D,D) covariant fields as the ‘fundamental’ variables, double field theory can accommodate novel geometries where a Riemannian metric cannot be defined, even locally.
Kevin Morand, Jeong-Hyuck Park
semanticscholar +1 more source
The tune of love and the nature(ness) of spacetime [PDF]
, 2016 The black hole information paradox is among the most outstanding puzzles in physics. I argue here there is yet another black hole quandary which, in light of the recent direct detection of gravitational waves by Advanced LIGO, reveals a new window to ...
Rafael A. Porto
semanticscholar +1 more source
Analytic Philosophy, EarlyView.ABSTRACT I give an argument for a version of the principle of sufficient reason from several plausible principles about negative facts and sufficient conditions. I then give an argument for a slightly weaker version of the principle without the reference to negative facts.
Stephen Harrop
wiley +1 more source
Creating a Universe, a Conceptual Model [PDF]
Философия и космология, 2016 Space is something. Space inherently contains laws of nature: universal rules (mathematics, space dimensions, types of forces, types of fields, and particle species), laws (relativity, quantum mechanics, thermodynamics, and electromagnetism) and ...
James R. Johnson
doaj
Negative branes, supergroups and the signature of spacetime [PDF]
, 2016 A bstractWe study the realization of supergroup gauge theories using negative branes in string theory. We show that negative branes are intimately connected with the possibility of timelike compactification and exotic spacetime signatures previously ...
R. Dijkgraaf +3 more
semanticscholar +1 more source
A Flaw in Sider's Vagueness Argument for Perdurantism: Endurantism Endures
Analytic Philosophy, EarlyView.ABSTRACT Sider's vagueness argument for perdurantism (2001: 126ff.) has long been seen as one of the most powerful, or perhaps the most powerful, in the perdurantist's arsenal. In its absence, the case against endurantism is significantly weakened. Despite its age, there is still no generally agreed view on its worth.
Harold W. Noonan
wiley +1 more source
Traversable wormhole for string, but not for particle
Physics Letters BWe propose a Lorentzian wormhole geometry characterized by a closed string massless sector with nontrivial H-flux and a scalar dilaton. In the string frame, the dilaton exhibits a negative kinetic term, enabling the existence of the wormhole.
Hun Jang +3 more
doaj +1 more source
The Distinctness of Objects Near and Far
Philosophy and Phenomenological Research, EarlyView.ABSTRACT Philosophers working on the metaphysics of persistence typically do not extend their views to the distinctness of objects at a single time. I argue that we can provide criteria to distinguish objects across time if and only if we can provide criteria to distinguish objects at a time. Furthermore, I endorse a stronger claim.
Erica Shumener
wiley +1 more source