2.2. Well-posedness in tempered distributions
By duality, we have that the solution operator defines a map 𝓢'(ℝ^n) → C(ℝ, 𝓢'(ℝ^n)).
By duality, we have that the solution operator defines a map 𝓢'(ℝ^n) → C(ℝ, 𝓢'(ℝ^n)).