Fast Multiplication: From Grade-School Multiplication To Karatsuba's Algorithm

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Question: Can we multiply 2 numbers using less than n^2 atomic multiplications? Yes, we can.

Update: There is O(n*log(n)) integer multiplication now: https://hal.archives-ouvertes.fr/hal-...

Karatsuba Multiplication On Wikipedia: https://en.wikipedia.org/wiki/Karatsu...

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