أرسل هذا في رسالة قصيرة: Acoustic wave scattering by two dimensional inclusion with irregular shape in an ideal fluid

 _____       ___      _  _     ______    _  _   
|  __ \\    / _ \\   | \| ||  /_   _//  | \| || 
| |  \ ||  | / \ ||  |  ' ||   -| ||-   |  ' || 
| |__/ ||  | \_/ ||  | .  ||   _| ||_   | .  || 
|_____//    \___//   |_|\_||  /_____//  |_|\_|| 
 -----`     `---`    `-` -`   `-----`   `-` -`