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Theorems · Theorem · number theory

tsum_eisSummand_eq_tsum_sigma_mul_cexp_pow

∀ {k : ℕ},
  3 ≤ k →
    Even k →
      ∀ (z : UpperHalfPlane),
        ∑' (v : Fin 2 → ℤ), EisensteinSeries.eisSummand (↑k) v z =
          2 * riemannZeta ↑k +
            2 * ((-2 * ↑Real.pi * Complex.I) ^ k / ↑(k - 1).factorial) *
              ∑' (n : ℕ+), ↑((ArithmeticFunction.sigma (k - 1)) ↑n) * Complex.exp (2 * ↑Real.pi * Complex.I * ↑z) ^ ↑n
Defined in
Mathlib.NumberTheory.ModularForms.EisensteinSeries.QExpansion
Cited by
1 results in Mathlib
Foundations
Depth 307 from the axioms · uses propext, Classical.choice, Quot.sound

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