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  "Title": "The Lorentz Transformation in Relativistic Physics",
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        "Lorentz",
        "lorentz"
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        "[.3vel",
        "[.4vel",
        "[.vel",
        "[<-.3vel",
        "[<-.4vel",
        "[<-.vel"
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        "4momentum",
        "as.4mom",
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        "fourmom",
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