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

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Text this: The homotopic invariance for fixed points of set-valued mappings in banach spaces