Theorem: SchwartzMap.Real.fourierIntegral_neg (ForML/SchwartzRealFourier.lean)

State before:
F : Type u_1
inst✝² : NormedAddCommGroup F
inst✝¹ : NormedSpace ℂ F
inst✝ : CompleteSpace F
f : 𝓢(ℝ, F)
ξ : ℝ
⊢ 𝓕 (fun x => -f x) ξ = -𝓕 (fun x => f x) ξ
Tactic:
simpa [Real.fourierIntegral_def] using integral_neg _
State after:
no goals