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The Twin Paradox

Edited by Virendra Tripathi (University of Nebraska, Lincoln, University of Nebraska, Omaha)
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  1. Hasok Chang (1993). A Misunderstood Rebellion. Studies in History and Philosophy of Science Part A 24 (5):741-790.
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  2. John Cramer, The Twin Paradox Revisited.
    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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  3. Antony Eagle (2005). A Note on Dolby and Gull on Radar Time and the Twin 'Paradox'. American Journal of Physics 73:976–979.
    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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  4. Amit Hagar (2013). Review of Tim Maudlin's Philosophy of Physics: Space & Time. [REVIEW] Physics in Perspective (x).
  5. Judit X. Madarász, István Németi & Gergely Székely (2006). Twin Paradox and the Logical Foundation of Relativity Theory. 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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  6. Teresa Marques (2008). The Square of Opposition and the Paradoxes. 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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  7. S. J. Prkhovnik (1989). The Twin Paradoxes of Special Relativity: Their Resolution and Implications. [REVIEW] 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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  8. Waldyr A. Rodrigues Jr & Marcio A. F. Rosa (1989). The Meaning of Time in the Theory of Relativity and “Einstein's Later View of the Twin Paradox”. 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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  9. Mendel Sachs (1989). Response to Rodrigues and Rosa on the Twin Paradox. 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. Mendel Sachs (1985). On Einstein's Later View of the Twin Paradox. 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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  11. Martin Schön (1998). Twin Paradox Without One-Way Velocity Assumptions. 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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  12. Gergely Székely (2010). A Geometrical Characterization of the Twin Paradox and its Variants. 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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