Some mathematics revision: Calculus II,
Calculus III - Laplace's Eqn and Curvilinear Coordinates, etc
Some extra notes on the Kronecker delta and Levi-Civita epsilon:
Some introductory notes on Tensors:
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Some papers on the Time Irreversibility of physical systems:
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Paper: Survival in the first hours of the Cenozoic - D. Robertson et al.
Contemporaneous Mass Extinctions
Probable Asteroidal Origin of the Tunguska Cosmic Body - P. Farinella, et al.