أرسل هذا في رسالة قصيرة: The nonabelian tensor squares of certain bieberbach groups with cyclic point group of order two

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