أرسل هذا في رسالة قصيرة: Arboricity : an acyclic hypergraph decomposition problem motivated by database theory

             ___     _    _    __   __            
  ____      / _ \\  | || | ||  \ \\/ //   ____    
 |    \\   / //\ \\ | || | ||   \ ` //   |    \\  
 | [] ||  |  ___  ||| \\_/ ||    | ||    | [] ||  
 |  __//  |_||  |_|| \____//     |_||    |  __//  
 |_|`-`   `-`   `-`   `---`      `-`'    |_|`-`   
 `-`                                     `-`