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

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Text this: The extended J-spectral factorization for descriptor systems