https://math.libretexts.org/Bookshelves/Differential_Equations/Differential_Equations_(Chasnov)/09%3A_Partial_Differential_Equations/9.06%3A_Solution_of_the_Wave_Equation
9.6: Solution of the Wave Equation - Mathematics LibreTexts
the wave equationsolutionmathematicslibretexts
https://arxiv.org/abs/1609.05049
[1609.05049] Regularization of an Ill-posed Cauchy Problem for the Wave Equation (Fourier Method)
Abstract page for arXiv paper 1609.05049: Regularization of an Ill-posed Cauchy Problem for the Wave Equation (Fourier Method)
the wave equationof anill posedcauchy problemregularization