أرسل هذا في رسالة قصيرة: On the existence of the solution and...variational formulation for the optimiza of the domain in elliptic problem

 _    _      ___      _____    __   __   _    _   
| |  | ||   / _ \\   /  ___||  \ \\/ // | |  | || 
| |/\| ||  | / \ || | // __     \ ` //  | |/\| || 
|  /\  ||  | \_/ || | \\_\ ||    | ||   |  /\  || 
|_// \_||   \___//   \____//     |_||   |_// \_|| 
`-`   `-`   `---`     `---`      `-`'   `-`   `-`