English
The map zτ ↦ θ₂'(z,τ) commutes with the star-structure, i.e., θ₂' maps under conjugation to θ₂' of conjugated arguments.
Русский
Картирование по сопряжению применимо к θ₂': θ₂'(z,τ) под конюгацией становится θ₂'(conj z, -conj τ).
LaTeX
$$$\theta_2'(z,\tau)^\ast = \theta_2'(\overline{z}, -\overline{\tau})$$$
Lean4
theorem jacobiTheta₂'_conj (z τ : ℂ) : conj (jacobiTheta₂' z τ) = jacobiTheta₂' (conj z) (-conj τ) :=
by
rw [← neg_inj, ← jacobiTheta₂'_neg_left, jacobiTheta₂', jacobiTheta₂', conj_tsum, ← tsum_neg]
congr 1 with n
simp_rw [jacobiTheta₂'_term, jacobiTheta₂_term, map_mul, ← Complex.exp_conj, map_add, map_mul, ← ofReal_intCast, ←
ofReal_ofNat, map_pow, conj_ofReal, conj_I]
ring_nf