What is most motivating way of introducing this function? Does it in itself have any real life applications that have an impact. I can only think of a^phi(n)=1 (mod n) which is powerful result but is this function used elsewhere.
2026-04-04 14:22:10.1775312530
What is the use of Euler Totient or Phi Function?
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RSA, or public-key cryptography is one of them.