Finite Field Notes: Difference between revisions
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== Totient == | == Totient == | ||
The number of values k for which 1 & | The number of values k for which 1 ≤ k ≤ n and gcd(n,k) == 1. For any prime, φ(p) = p-1. | ||
Revision as of 04:26, 17 January 2016
I learned all this for cyclic keys, then I forgot it. This time I'm taking notes
Totient
The number of values k for which 1 ≤ k ≤ n and gcd(n,k) == 1. For any prime, φ(p) = p-1.