發送短信 : Metric spaces under interval uncertainty: Towards an adequate definition

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