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    2. Science and Math Textbooks

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  2. Physics

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    3. Quantum Physics

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    7. Beyond the Standard Model

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  3. Astronomy and Cosmology

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  4. Mathematics

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    2. Calculus

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    6. Differential Geometry

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    7. Set Theory, Logic, Probability, Statistics

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    8. Math Software and LaTeX

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  5. Engineering

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    5. Nuclear Engineering

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  6. Other Sciences

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  7. PF Lounge

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