Text this: Nonlinear filters based on Taylor series expansions

  _____     _____     _____      ___      _  __  
 /  ___||  |  ___||  / ____||   / _ \\   | |/ // 
| // __    | ||__   / //---`'  / //\ \\  | ' //  
| \\_\ ||  | ||__   \ \\___   |  ___  || | . \\  
 \____//   |_____||  \_____|| |_||  |_|| |_|\_\\ 
  `---`    `-----`    `----`  `-`   `-`  `-` --`