أرسل هذا في رسالة قصيرة: A three-level average implicit finite difference scheme to solve equation obtained by coupling the Rosenau-KdV equation and the Rosenau-RLW equation

 _    _    _    _               ______    ______  
| |  | || | || | ||     ___    /_   _//  /_____// 
| |/\| || | || | ||    /   ||   -| ||-   `____ `  
|  /\  || | \\_/ ||   | [] ||   _| ||_   /___//   
|_// \_||  \____//     \__ ||  /_____//  `__ `    
`-`   `-`   `---`       -|_||  `-----`   /_//     
                         `-`             `-`