a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
⊢ IntegrableOn (fun a_1 => ‖↑a_1 ^ a‖) (Ioi c)

a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
⊢ AEStronglyMeasurable (fun t => ↑t ^ a) (Measure.restrict volume (Ioi c))
a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
⊢ IntegrableOn (fun t => ↑t ^ a) (Ioi c)
rw [IntegrableOn, ← integrable_norm_iff, ← IntegrableOn]
a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
x : ℝ
hx : x ∈ Ioi c
⊢ x ^ a.re = ‖↑x ^ a‖

a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
⊢ AEStronglyMeasurable (fun t => ↑t ^ a) (Measure.restrict volume (Ioi c))
a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
⊢ IntegrableOn (fun a_1 => ‖↑a_1 ^ a‖) (Ioi c)

a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
⊢ AEStronglyMeasurable (fun t => ↑t ^ a) (Measure.restrict volume (Ioi c))
refine' (integrableOn_Ioi_rpow_of_lt ha hc).congr_fun (fun x hx => _) measurableSet_Ioi
a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
x : ℝ
hx : x ∈ Ioi c
⊢ x ^ a.re = ‖↑x ^ a‖
a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
x : ℝ
hx : x ∈ Ioi c
⊢ x ^ a.re = ‖↑x ^ a‖
dsimp only
no goals
a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
x : ℝ
hx : x ∈ Ioi c
⊢ x ^ a.re = ‖↑x ^ a‖
rw [Complex.norm_eq_abs, Complex.abs_cpow_eq_rpow_re_of_pos (hc.trans hx)]
a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
t : ℝ
ht : t ∈ Ioi c
⊢ ContinuousWithinAt (fun t => ↑t ^ a) (Ioi c) t
a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
⊢ AEStronglyMeasurable (fun t => ↑t ^ a) (Measure.restrict volume (Ioi c))
refine' ContinuousOn.aestronglyMeasurable (fun t ht => _) measurableSet_Ioi
no goals
a : ℂ
ha : a.re < -1
c : ℝ
hc : 0 < c
t : ℝ
ht : t ∈ Ioi c
⊢ ContinuousWithinAt (fun t => ↑t ^ a) (Ioi c) t
exact
  (Complex.continuousAt_ofReal_cpow_const _ _ (Or.inr (hc.trans ht).ne')).continuousWithinAt