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A Quadratic Curvature Lagrangian of Pawlowski and Raczka: A Finger Exercise with MathTensor
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Recently Pawlowski and Raczka (P&R) proposed a unified model for the fundamental interactions which does not contain a physical Higgs field. The gravitational field equation of their model is rederived under heavy use of the computer algebra system Mathematica and its package MathTensor.
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http://www.arxiv.org/abs/gr-qc/9601002
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