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Theorems · Theorem · number theory

ArithmeticFunction.vonMangoldt.not_summable_residueClass_prime_div

∀ {q : ℕ} [NeZero q] {a : ZMod q},
  IsUnit a → ¬Summable fun n => (if Nat.Prime n then ArithmeticFunction.vonMangoldt.residueClass a n else 0) / ↑n

The function n ↦ Λ n / n restricted to primes in an invertible residue class is not summable. This then implies that there must be infinitely many such primes.

Defined in
Mathlib.NumberTheory.LSeries.PrimesInAP
Cited by
1 results in Mathlib
Foundations
Depth 321 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
NeZero

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