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 _    _      ___      _  _     _____             
| \  / ||   / _ \\   | \| ||  |  ___||     ___   
|  \/  ||  | / \ ||  |  ' ||  | ||__      /   || 
| .  . ||  | \_/ ||  | .  ||  | ||__     | [] || 
|_|\/|_||   \___//   |_|\_||  |_____||    \__ || 
`-`  `-`    `---`    `-` -`   `-----`      -|_|| 
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Text this: Halpern's iteration for strongly relatively nonexpansive mappings in Banach spaces