The given wave function satisfies the continuity condition, and is differentiable to all orders with reaspect to both t and x , but is not normolizable ; specifically , φ^* φ=A^* A is constant in both space abd time, and if the pricle is to move freely, there can be no limit its to its range, and so the integral of φ^* φ over an in finite region cannot be finite if A≠0 A linear superposition of such could give a normalizable wave function, corresponding to a real particle. Such a superposition would necessarily have a non-zero , and hence a finite ; at the is composed of different momentum states, and is localized.