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.