8 found
Order:
See also
Jb Manchak
University of California, Irvine
  1.  42
    Malament–Hogarth Machines.J. B. Manchak - 2020 - British Journal for the Philosophy of Science 71 (3):1143-1153.
    This article shows a clear sense in which general relativity allows for a type of ‘machine’ that can bring about a spacetime structure suitable for the implementation of ‘supertasks’. 1Introduction2Preliminaries3Malament–Hogarth Spacetimes4Machines5Malament–Hogarth Machines6Conclusion.
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   5 citations  
  2.  35
    Would Two Dimensions Be World Enough for Spacetime?Samuel C. Fletcher, J. B. Manchak, Mike D. Schneider & James Owen Weatherall - 2018 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 63:100-113.
    We consider various curious features of general relativity, and relativistic field theory, in two spacetime dimensions. In particular, we discuss: the vanishing of the Einstein tensor; the failure of an initial-value formulation for vacuum spacetimes; the status of singularity theorems; the non-existence of a Newtonian limit; the status of the cosmological constant; and the character of matter fields, including perfect fluids and electromagnetic fields. We conclude with a discussion of what constrains our understanding of physics in different dimensions.
    Direct download (12 more)  
     
    Export citation  
     
    Bookmark   5 citations  
  3.  40
    Paradox Regained? A Brief Comment on Maudlin on Black Hole Information Loss.J. B. Manchak & James Owen Weatherall - 2018 - Foundations of Physics 48 (6):611-627.
    We discuss some recent work by Tim Maudlin concerning Black Hole Information Loss. We argue, contra Maudlin, that there is a paradox, in the straightforward sense that there are propositions that appear true, but which are incompatible with one another. We discuss the significance of the paradox and Maudlin's response to it.
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  4.  22
    Some “No Hole” Spacetime Properties Are Unstable.J. B. Manchak - 2018 - Foundations of Physics 48 (11):1539-1545.
    We show a sense in which the spacetime property of effective completeness—a type of “local hole-freeness” or “local inextendibility”—is not stable.
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  5.  5
    General Relativity as a Collection of Collections of Models.J. B. Manchak - 2021 - In Elena Aladova, Pablo Barceló, Johan van Benthem, Gerald Berger, Katrin M. Dannert, Neil Dewar, Răzvan Diaconescu, Ivo Düntsch, Wojciech Dzik, M. Eyad Kurd-Misto, Giambattista Formica, Michèle Friend, Robert Goldblatt, Georg Gottlob, Erich Grädel, Robin Hirsch, Ian Hodkinson, Marcel Jackson, Peter Jipsen, Roger D. Maddux, J. B. Manchak, Ewa Orłowska, Andreas Pieris, Boris Plotkin, Tatjana Plotkin, Vaughan R. Pratt, Ian Pratt-Hartmann, Tarek Sayed Ahmed, James Owen Weatherall, Dag Westerståhl, James Wimberley, Krzysztof Wójtowicz & Christian Wüthrich (eds.), Hajnal Andréka and István Németi on Unity of Science: From Computing to Relativity Theory Through Algebraic Logic. Springer Verlag. pp. 409-425.
    One usually identifies a particular collection of geometric objects with the models of general relativity. But within this standard collection lurk ‘physically unreasonable’ models of spacetime. If such models are ruled out, attention can be restricted to some sub-collection of ‘physically reasonable’ models which can be considered a variant theory of general relativity. Since we have yet to identify a privileged sub-collection of ‘physically reasonable’ models, it is helpful to think of ‘general relativity’ in a pluralistic way; we can study (...)
    No categories
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  6.  36
    A Remark on ‘Time Machines’ in Honor of Howard Stein.J. B. Manchak - 2019 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 67:111-116.
    No categories
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  7.  22
    Hajnal Andréka and István Németi on Unity of Science: From Computing to Relativity Theory Through Algebraic Logic.Elena Aladova, Pablo Barceló, Johan van Benthem, Gerald Berger, Katrin M. Dannert, Neil Dewar, Răzvan Diaconescu, Ivo Düntsch, Wojciech Dzik, M. Eyad Kurd-Misto, Giambattista Formica, Michèle Friend, Robert Goldblatt, Georg Gottlob, Erich Grädel, Robin Hirsch, Ian Hodkinson, Marcel Jackson, Peter Jipsen, Roger D. Maddux, J. B. Manchak, Ewa Orłowska, Andreas Pieris, Boris Plotkin, Tatjana Plotkin, Vaughan R. Pratt, Ian Pratt-Hartmann, Tarek Sayed Ahmed, James Owen Weatherall, Dag Westerståhl, James Wimberley, Krzysztof Wójtowicz & Christian Wüthrich (eds.) - 2021 - Springer Verlag.
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark  
  8.  17
    Space and Time.J. B. Manchak - unknown
    Here, formal tools are used to pose and answer several philosophical questions concerning space and time. The questions involve the properties of possible worlds allowed by the general theory of relativity. In particular, attention is given to various causal properties such as "determinism" and "time travel".
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark