أرسل هذا في رسالة قصيرة: Equivalence classes and canonical forms for two-qutrit entangled states of rank four having positive partial transpose

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