The Twin Paradox

Edited by Virendra Tripathi (University of Nebraska, Lincoln, University of Nebraska, Omaha)
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  1. added 2018-10-27
    Apparent Simultaneity.Hanoch Ben-Yami - unknown
    I develop Special Relativity with backward-light-cone simultaneity, which I call, for reasons made clear in the paper, ‘Apparent Simultaneity’. In the first section I show some advantages of this approach. I then develop the kinematics in the second section. In the third section I apply the approach to the Twins Paradox: I show how it removes the paradox, and I explain why the paradox was a result of an artificial symmetry introduced to the description of the process by Einstein’s simultaneity (...)
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  2. added 2016-06-18
    Bergson: Challenger to Einstein's Theory of Time. [REVIEW]Ray Scott Percival - 2000 - Times Higher Education:1 - 2.
    Henri Bergson is perhaps most remembered for his bold challenge to Einstein's theory of the relativity of simultaneity. Bergson maintained that Einstein's theory did not cope with our intuition of time, which is an intuition of duration. Einstein retorted that there may be psychological time, but there is no special philosopher's time. For Einstein, time forms the fourth dimension of a so-called Parmenidean "block universe". I argue that we must be on our guard not to read into the work of (...)
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  3. added 2015-08-27
    sSecial Relativity and Perception: The Singular Time of Philosophy and Physics.Stephen E. Robbins - 2010 - Journal of Consciousness Exploration and Research 1:500-531.
    The Special Theory of Relativity (STR) holds sway as a theory of time due to its apparently successful predictive structure regarding time-related phenomena such as the increased life spans of mesons or retarded clocks on jets circling the globe, and due to the relativization of simultaneity intrinsic to this theoretical structure. Yet the very structure of the theory demands that such very real physical effects be construed as non-ontological. The scope and depth of this contradiction is explored and, if these (...)
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  4. added 2015-08-13
    Time in Classical and Relativistic Physics.Gordon Belot - 2013 - In Adrian Bardon & Heather Dyke (eds.), A Companion to the Philosophy of Time. Blackwell. pp. 185-200.
    This is a short, nontechnical introduction to features of time in classical and relativistic physics and their representation in the four-dimensional geometry of spacetime. Topics discussed include: the relativity of simultaneity in special and general relativity; the ‘twin paradox’ and differential aging effects in special and general relativity; and time travel in general relativity.
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  5. added 2014-04-02
    The Twin Paradox Revisited.John Cramer - unknown
    Alternate View Column AV-38 Keywords: special relativity, twin paradox, time dilation, starship, Einstein, Lorentz factor Published in the March-1990 issue of Analog Science Fiction & Fact Magazine; This column was written and submitted 8/20/89 and is copyrighted © 1989, John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.
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  6. added 2014-03-29
    Twin Paradox Without One-Way Velocity Assumptions.Martin Schön - 1998 - Foundations of Physics 28 (2):185-204.
    The twin paradox (i.e. the reasoning made by the traveling twin, reversing the reasoning made by the earthbound twin, by which it is he who should be older) can be resolved by taking into account the relativity of simultaneity. However, simultaneity depends on a convention about the one-way velocity of light provided that the Reichenbach-Grünbaum hypothesis, is time. So far the resolution has been presented only for the Einstein convention. We show that for all possible choices of the relevant synchronization (...)
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  7. added 2014-03-18
    Twin Paradox and the Logical Foundation of Relativity Theory.Judit X. Madarász, István Németi & Gergely Székely - 2006 - Foundations of Physics 36 (5):681-714.
    We study the foundation of space-time theory in the framework of first-order logic (FOL). Since the foundation of mathematics has been successfully carried through (via set theory) in FOL, it is not entirely impossible to do the same for space-time theory (or relativity). First we recall a simple and streamlined FOL-axiomatization Specrel of special relativity from the literature. Specrel is complete with respect to questions about inertial motion. Then we ask ourselves whether we can prove the usual relativistic properties of (...)
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  8. added 2014-03-07
    A Geometrical Characterization of the Twin Paradox and its Variants.Gergely Székely - 2010 - Studia Logica 95 (1-2):161 - 182.
    The aim of this paper is to provide a logic-based conceptual analysis of the twin paradox (TwP) theorem within a first-order logic framework. A geometrical characterization of TwP and its variants is given. It is shown that TwP is not logically equivalent to the assumption of the slowing down of moving clocks, and the lack of TwP is not logically equivalent to the Newtonian assumption of absolute time. The logical connection between TwP and a symmetry axiom of special relativity is (...)
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  9. added 2013-12-11
    Response to Rodrigues and Rosa on the Twin Paradox.Mendel Sachs - 1989 - Foundations of Physics 19 (12):1525-1528.
    This paper responds briefly to the criticism of Rodrigues and Rosa on my earlier analysis of the twin paradox. The main point that I have emphasized (and that the authors have not refuted, either logically or mathematically) is the error in directly identifying anabstract measure relative to a reference frame [and its transformations to all other possible reference frames in which the laws of nature are to be compared (such as temporal and spatial measures)], with aphysical extension and duration of (...)
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  10. added 2013-12-10
    The Meaning of Time in the Theory of Relativity and “Einstein's Later View of the Twin Paradox”.Waldyr A. Rodrigues Jr & Marcio A. F. Rosa - 1989 - Foundations of Physics 19 (6):705-724.
    The purpose of the present paper is to reply to a misleading paper by M. Sachs entitled “Einstein's later view of the Twin Paradox” (TP) (Found. Phys. 15, 977 (1985)). There, by selecting some passages from Einstein's papers, he tried to convince the reader that Einstein changed his mind regarding the asymmetric aging of the twins on different motions. Also Sachs insinuates that he presented several years ago “convincing mathematical arguments” proving that the theory of relativity does not predict asymmetrical (...)
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  11. added 2013-12-04
    On Einstein's Later View of the Twin Paradox.Mendel Sachs - 1985 - Foundations of Physics 15 (9):977-980.
    It is shown that Einstein abandoned his earlier view that there are material consequences, such as asymmetric aging, implied by the space-time transformations of transformations of relativity theory.
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  12. added 2013-12-01
    The Twin Paradoxes of Special Relativity: Their Resolution and Implications. [REVIEW]S. J. Prkhovnik - 1989 - Foundations of Physics 19 (5):541-552.
    The resolution of the Langevin paradox for an out-and-return journey gives rise to a result which appears to violate the underlying basis of special relativity. The resolution of this second paradox, due to G. Builder, leads to a physically-intelligible interpretation of Einstein's theory and reconciles it with the cosmologically-based fundamental reference frame revealed by modern astronomy.
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  13. added 2013-03-12
    The Square of Opposition and the Paradoxes.Teresa Marques - 2008 - Logica Universalis 2 (1):87-105.
    Can an appeal to the difference between contrary and contradictory statements, generated by a non-uniform behaviour of negation, deal adequately with paradoxical cases like the sorites or the liar? This paper offers a negative answer to the question. This is done by considering alternative ways of trying to construe and justify in a useful way (in this context) the distinction between contraries and contradictories by appealing to the behaviour of negation only. There are mainly two ways to try to do (...)
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  14. added 2012-11-27
    Review of Tim Maudlin's Philosophy of Physics: Space & Time. [REVIEW]Amit Hagar - 2013 - Physics in Perspective (x).
  15. added 2011-05-31
    A Misunderstood Rebellion.Hasok Chang - 1992 - Studies in History and Philosophy of Science Part A 24 (5):741-790.
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  16. added 2011-04-01
    The Ultimate Paradigm of Science.Stephen Mooney - manuscript
  17. added 2009-09-22
    The Twin Paradox and Einstein Mistake.Victor Orsini - manuscript
    Time contraction is not a property of the moving body. Permanent contraction is against the constancy of the speed of light. Einstein uses wrong units of measurement and comes to wrong conclusions. We use the translation of the article "On the electrodynamics of moving bodies".
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  18. added 2008-12-31
    Twin Paradox and the Logical Foundation of Relativity Theory.X. Madárasz Judit, Németi István & Székely Gergely - unknown
    We study the foundation of space-time theory in the framework of first-order logic (FOL). Since the foundation of mathematics has been successfully carried through (via set theory) in FOL, it is not entirely impossible to do the same for space-time theory (or relativity). First we recall a simple and streamlined FOL-axiomatization SpecRel of special relativity from the literature. SpecRel is complete with respect to questions about inertial motion. Then we ask ourselves whether we can prove the usual relativistic properties of (...)
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  19. added 2008-12-31
    A Note on Dolby and Gull on Radar Time and the Twin 'Paradox'.Antony Eagle - 2005 - American Journal of Physics 73 (10):976–979.
    Recently a suggestion has been made that standard textbook representations of hypersurfaces of simultaneity for the travelling twin in the twin 'paradox' are incorrect. This suggestion is false: the standard textbooks are in agreement with a proper understanding of the relativity of simultaneity.
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