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  _____      ___      _____     _____             
 / ____||   / _ \\   |__  //   |  ___||     ___   
/ //---`'  / //\ \\    / //    | ||__      /   || 
\ \\___   |  ___  ||  / //__   | ||__     | [] || 
 \_____|| |_||  |_|| /_____||  |_____||    \__ || 
  `----`  `-`   `-`  `-----`   `-----`      -|_|| 
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發送短信 : Endpoints of multi-valued weakly contraction in complete metric spaces endowed with graphs