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Everything about Carmichael function

Function in mathematical number theory

In number theory, a branch of mathematics, the Carmichael function λ(n) of a positive integer n is the smallest positive integer m such that holds for every integer a coprime to n. In algebraic terms, λ(n) is the exponent of the multiplicative group of integers modulo n. As this is a finite abelian group, there must exist an element whose order equals the exponent, λ(n). Such an element is called a primitive λ-root modulo n. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Carmichael functionA 5-minute orientation
  2. Pick up a classic book: RNA silencingThe most-reprinted book on the subject
  3. Read the landmark paper: On the moments of the Carmichael λ functionCited 4 times
  4. Go sideways: Root of unity modulo nA closely related topic
  5. Go sideways: Multiplicative group of integers modulo nA closely related topic

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