theorem
proved
term proof
mellin_pullback_pointwise
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formal statement (Lean)
89theorem mellin_pullback_pointwise
90 {f : ℝ → ℝ} (hf : ReciprocalSymmetric f) (s : ℝ) (x : ℝ) (hx : 0 < x) :
91 f x * x ^ (s - 1) = f x⁻¹ * x ^ (s - 1) := by
proof body
Term-mode proof.
92 rw [hf x hx]
93
94/-- The reflection-substitution: under `x ↦ 1/x`, the kernel
95 transforms as if `s → 1 - s` after accounting for the Jacobian. -/