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

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Text this: Interior fixed points of unit-sphere-preserving Euclidean maps