Finite Field Notes: Difference between revisions

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== Totient ==
== Totient ==
The number of values k for which 1 &lte; k &lte; n and gcd(n,k) == 1. For any prime, φ(p) = p-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.