Solutions of wave functions that take the form
$$u(x, t) = \frac{1}{2}[f(x+t) + f(x-t)] + \frac{1}{2}\int_{x-t}^{x+t}g(y) \ \mathrm{d}y$$Solutions of wave functions that take the form
$$u(x, t) = \frac{1}{2}[f(x+t) + f(x-t)] + \frac{1}{2}\int_{x-t}^{x+t}g(y) \ \mathrm{d}y$$