English
Conjugation commutes with the Gamma integral: ΓIntegral(conj s) = conj(ΓIntegral s).
Русский
Сопряжение числа сохраняется под гамма-интегралом: ΓIntegral(conj s) = conj(ΓIntegral s).
LaTeX
$$$$ \GammaIntegral(\overline{s}) = \overline{\GammaIntegral(s)}. $$$$
Lean4
theorem GammaIntegral_conj (s : ℂ) : GammaIntegral (conj s) = conj (GammaIntegral s) :=
by
rw [GammaIntegral, GammaIntegral, ← integral_conj]
refine setIntegral_congr_fun measurableSet_Ioi fun x hx => ?_
dsimp only
rw [RingHom.map_mul, conj_ofReal, cpow_def_of_ne_zero (ofReal_ne_zero.mpr (ne_of_gt hx)),
cpow_def_of_ne_zero (ofReal_ne_zero.mpr (ne_of_gt hx)), ← exp_conj, RingHom.map_mul, ← ofReal_log (le_of_lt hx),
conj_ofReal, RingHom.map_sub, RingHom.map_one]