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82Is the Universe As Large As It Can Be?Erkenntnis 81 (6): 1341-1344. 2016.In this note, we cast doubt on the requirement of spacetime inextendibility; it is not at all clear that our universe is “as large as it can be.”
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46Time Travel: Why It May Not Pay to Work out All the KinksPhilosophy of Science 78 (5): 1037-1045. 2011.Here, we hypothesize that a smooth nongeodesic closed timelike curve is never most efficient with respect to total acceleration if a kink is permitted at the initial point. We support our hypothesis in a variety of ways. Most notably, we show Malament's opposing conjecture concerning Gödel space-time to be false.
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72On Gödel and the Ideality of TimePhilosophy of Science 83 (5): 1050-1058. 2016.Gödel's remarks concerning the ideality of time are examined. In the literature, some of these remarks have been somewhat neglected while others have been heavily criticized. In this note, we propose a clear and defensible sense in which Gödel's work bears on the question of whether there is an objective lapse of time in our world.
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60Global Spacetime StructureCambridge University Press. 2013.This exploration of the global structure of spacetime within the context of general relativity examines the causal and singular structures of spacetime, revealing some of the curious possibilities that are compatible with the theory, such as `time travel' and `holes' of various types. Investigations into the epistemic and modal structures of spacetime highlight the difficulties in ruling out such possibilities, unlikely as they may seem at first. The upshot seems to be that what counts as a `phy…Read more
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94On the Possibility of Supertasks in General RelativityFoundations of Physics 40 (3): 276-288. 2010.Malament-Hogarth spacetimes are the sort of models within general relativity that seem to allow for the possibility of supertasks. There are various ways in which these spacetimes might be considered physically problematic. Here, we examine these criticisms and investigate the prospect of escaping them
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Areas of Specialization
General Relativity |
Areas of Interest
General Relativity |
PhilPapers Editorships
General Relativity |