Text this: On δ-convergence of the Ishikawa iterative process for nonexpansive mappings in cat(0) spaces

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