An explicit formula for the nonstationary diffracted wave scattered on a   NN-wedge
  We consider two dimensional nonstationary scattering of plane waves by a NN-wedge. We prove the existence and uniqueness of a solution to the corresponding mixed problem and we give an explicit formula for the solution. Also the Limiting Amplitude Principle is proved and a rate of convergence to the limiting amplitude is obtained. 
Anel Esquivel Navarrete, Anatoli Merzon
math.AP