generalize hξ : L1_of_mul hpq f g = ξ
E : Type u_1
inst✝¹ : MeasurableSpace E
μ : Measure E
p q : ℝ≥0∞
hpq : p⁻¹ + q⁻¹ = 1
𝕜 : Type u_2
inst✝ : NormedRing 𝕜
f : ↥(Lp 𝕜 p)
g : ↥(Lp 𝕜 q)
⊢ ‖L1_of_mul hpq f g‖ ≤ ‖f‖ * ‖g‖
E : Type u_1
inst✝¹ : MeasurableSpace E
μ : Measure E
p q : ℝ≥0∞
hpq : p⁻¹ + q⁻¹ = 1
𝕜 : Type u_2
inst✝ : NormedRing 𝕜
f : ↥(Lp 𝕜 p)
g : ↥(Lp 𝕜 q)
ξ : ↥(Lp 𝕜 1)
hξ : L1_of_mul hpq f g = ξ
⊢ ‖ξ‖ ≤ ‖f‖ * ‖g‖