Proofs
https://www.youtube.com/watch?v=HIkIqt_ytdc

Fermat's Little Theorem
 https://mathworld.wolfram.com/FermatsLittleTheorem.html
Euler's Function
 https://en.wikipedia.org/wiki/Euler's_totient_function
Elliptic Curves: Point Addition
 https://www.rareskills.io/post/elliptic-curves-finite-fields
 
Fundamentals
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AverageGary
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