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SUMMARY:Leibniz\, Mach and the C-Series - Karim Thébault (University of B
 ristol)
DTSTART:20181024T120000Z
DTEND:20181024T133000Z
UID:TALK111169@talks.cam.ac.uk
CONTACT:Matt Farr
DESCRIPTION:According to Carlo Rovelli the (undirected) time orderings of 
 physical states should be given relationally via reference to internal clo
 cks [1]. Internal clocks do not generically provide an always increasing (
 or decreasing) parameterization of physical states. This means that Rovell
 i's internal time proposal allows for violations of 'temporal monotonicity
 '. Alternative proposals that retain temporal monotonicity have recently b
 een shown to lead to physically distinct models for quantum cosmology [2].
  The status of temporal monotonicity is thus of potential empirical signif
 icance.\n\nIn this talk we will consider the status temporal monotonicity 
 in a philosophical perspective with reference to three particular historic
 al figures. First\, we will examine the extent to which this aspect of tim
 e features in Leibniz's positive account of time\, as reconstructed by Art
 hur [3]. Next\, we will considering the relevance of some suggestive remar
 ks from Mach's _Science of Mechanics_ [4]. Finally\, we will consider the 
 extent to which temporal monotonicity is equivalent to McTaggart's C-serie
 s\, as reconstructed by Farr [5].\n\nWe conclude by briefly considering th
 e challenge to various forms of realism about temporal monotonicity posed 
 by general relativity.\n\n[1] Rovelli\, C. (2002) _Phys. Rev. D_ 65 124013
 .\n\n[2] Gryb\, S.\, & Thébault\, K. P. (2018). _Physics Letters B_ 784 3
 24-329.\n\n[3] Arthur\, R. T. (1985). Leibniz's theory of time. In _The na
 tural philosophy of Leibniz_\, pp. 263–313. Springer.\n\n[4] Mach\, E. (
 2013). _The Science of Mechanics._ Cambridge University Press.\n\n[5] Farr
 \, M. _The C Theory of Time._ Unpublished draft.
LOCATION:Seminar Room 2\, Department of History and Philosophy of Science
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